diff --git a/Cargo.lock b/Cargo.lock
index 4ea3d3c..3d863c7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -24,6 +24,17 @@ version = "1.0.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7825f6833612eb2414095684fcf6c635becf3ce97fe48cf6421321e93bfbd53c"
 
+[[package]]
+name = "async-trait"
+version = "0.1.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da71fef07bc806586090247e971229289f64c210a278ee5ae419314eb386b31d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -1167,6 +1178,7 @@ name = "tagwiki"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "async-trait",
  "blake2",
  "digest",
  "env_logger",
diff --git a/Cargo.toml b/Cargo.toml
index 5b97060..97a4c7a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,3 +29,4 @@ blake2 = "*"
 digest = "*"
 hex = "*"
 walkdir = "*"
+async-trait = "0.1.30"
diff --git a/src/index.rs b/src/index.rs
index a83f4c1..4f10c88 100644
--- a/src/index.rs
+++ b/src/index.rs
@@ -1,21 +1,23 @@
 use crate::page;
 
-use crate::page::{Id, Tag};
+use crate::page::{Id, Tag, TagRef};
 use anyhow::Result;
+use async_trait::async_trait;
+use log::info;
 use std::collections::{HashMap, HashSet};
 
 #[derive(Default)]
-struct Index<T> {
+pub struct Index<T> {
     // tag -> page_ids
     page_ids_by_tag: HashMap<String, HashSet<Id>>,
     tags_by_page_id: HashMap<Id, Vec<Tag>>,
-    inner: T,
+    store: T,
 }
 
-#[derive(Default)]
-struct FindResults {
-    matching_pages: Vec<Id>,
-    matching_tags: Vec<page::Tag>,
+#[derive(Default, Debug, Clone)]
+pub struct FindResults {
+    pub matching_pages: Vec<Id>,
+    pub matching_tags: Vec<page::Tag>,
 }
 
 impl FindResults {
@@ -24,19 +26,49 @@ impl FindResults {
     }
 }
 
+impl<T> Index<T>
+where
+    T: page::StoreMut,
+{
+    pub async fn new(store: T) -> Result<Self> {
+        let mut s = Index {
+            page_ids_by_tag: Default::default(),
+            tags_by_page_id: Default::default(),
+            store,
+        };
+
+        s.index_inner().await?;
+
+        Ok(s)
+    }
+
+    async fn index_inner(&mut self) -> Result<()> {
+        let mut count = 0;
+        let ids = self.store.iter().await?.collect::<Vec<page::Id>>();
+        for id in ids {
+            count += 1;
+            let page = self.store.get(id).await?;
+            self.add_data_for_page(&page);
+        }
+        info!("Indexed {} pages", count);
+        Ok(())
+    }
+}
+
 impl<T> Index<T> {
-    fn find(&self, tags: &[&Tag]) -> FindResults {
-        let mut matching_pages = vec![];
-        let mut matching_tags = vec![];
+    pub fn find(&self, tags: &[TagRef]) -> FindResults {
+        let mut matching_pages: Vec<String> = vec![];
+        let mut matching_tags: Vec<String> = vec![];
         for tag in tags {
             if matching_tags.is_empty() {
-                if let Some(ids) = self.page_ids_by_tag.get(tag.as_str()) {
+                if let Some(ids) = dbg!(&self.page_ids_by_tag).get(*tag) {
                     matching_pages = ids.iter().map(|id| id.to_owned()).collect();
+                    matching_tags.push(tag.to_string())
                 } else {
                     return FindResults::empty();
                 }
             } else {
-                if let Some(ids) = self.page_ids_by_tag.get(tag.as_str()) {
+                if let Some(ids) = self.page_ids_by_tag.get(*tag) {
                     let new_matching_pages: Vec<_> = matching_pages
                         .iter()
                         .filter(|id| ids.contains(id.as_str()))
@@ -65,6 +97,17 @@ impl<T> Index<T> {
         }
     }
 
+    fn add_data_for_page(&mut self, page: &page::Parsed) {
+        for tag in dbg!(&page.tags) {
+            self.page_ids_by_tag
+                .entry(tag.clone())
+                .or_default()
+                .insert(page.headers.id.clone());
+            self.tags_by_page_id
+                .insert(page.headers.id.clone(), page.tags.clone());
+        }
+    }
+
     fn clean_data_for_page(&mut self, id: Id) {
         for tag in self
             .tags_by_page_id
@@ -80,37 +123,34 @@ impl<T> Index<T> {
     }
 }
 
+#[async_trait]
 impl<T> page::StoreMut for Index<T>
 where
-    T: page::StoreMut,
+    T: page::StoreMut + Send + Sync,
 {
-    fn get(&mut self, id: Id) -> Result<page::Parsed> {
-        self.inner.get(id)
+    async fn get(&self, id: Id) -> Result<page::Parsed> {
+        self.store.get(id).await
     }
-    fn put(&mut self, page: &page::Parsed) -> Result<()> {
-        self.inner.put( page)?;
+
+    async fn put(&mut self, page: &page::Parsed) -> Result<()> {
+        self.store.put(page).await?;
 
         if let Some(_tags) = self.tags_by_page_id.get(&page.headers.id) {
             self.clean_data_for_page(page.headers.id.clone());
         }
 
-        for tag in &page.tags {
-            self.page_ids_by_tag
-                .get_mut(tag)
-                .map(|set| set.insert(page.headers.id.clone()));
-            self.tags_by_page_id
-                .insert(page.headers.id.clone(), page.tags.clone());
-        }
+        self.add_data_for_page(page);
         Ok(())
     }
-    fn delete(&mut self, id: Id) -> Result<()> {
-        self.inner.delete(id.clone())?;
+
+    async fn delete(&mut self, id: Id) -> Result<()> {
+        self.store.delete(id.clone()).await?;
         self.clean_data_for_page(id);
 
         Ok(())
     }
 
-    fn iter<'s>(&'s mut self) -> Result<Box<dyn Iterator<Item = Id> + 's>> {
-        self.inner.iter()
+    async fn iter<'s>(&'s self) -> Result<Box<dyn Iterator<Item = Id> + 's>> {
+        self.store.iter().await
     }
 }
diff --git a/src/main.rs b/src/main.rs
index a4a2967..99f8baf 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,9 +2,12 @@
 
 use anyhow::Result;
 use log::info;
+use std::sync::Arc;
 use structopt::StructOpt;
 use warp::{path::FullPath, Filter};
 
+use page::StoreMut;
+
 /// Command line options
 mod cli;
 /// Page
@@ -15,22 +18,59 @@ mod index;
 /// Utils
 mod util;
 
-async fn handler(path: FullPath) -> Result<String, std::convert::Infallible> {
+#[derive(Debug)]
+struct RejectAnyhow(anyhow::Error);
+
+impl warp::reject::Reject for RejectAnyhow {}
+
+struct State {
+    page_store:
+        Arc<tokio::sync::RwLock<index::Index<Box<dyn page::store::StoreMut + Sync + Send>>>>,
+}
+
+fn with_state(
+    state: Arc<State>,
+) -> impl Filter<Extract = (Arc<State>,), Error = std::convert::Infallible> + Clone {
+    warp::any().map(move || state.clone())
+}
+
+async fn handler(
+    state: Arc<State>,
+    path: FullPath,
+) -> std::result::Result<Box<dyn warp::Reply>, warp::Rejection> {
     let tags: Vec<_> = path
         .as_str()
         .split('/')
         .map(|t| t.trim())
         .filter(|t| t != &"")
         .collect();
-    Ok(format!("Path: {:?}", tags))
+    let read = state.page_store.read().await;
+    let results = read.find(tags.as_slice());
+    if results.matching_pages.len() == 1 {
+        let page = read
+            .get(results.matching_pages[0].clone())
+            .await
+            .map_err(|e| warp::reject::custom(RejectAnyhow(e)))?;
+        Ok(Box::new(warp::reply::html(page.html)))
+    } else {
+        Ok(Box::new(format!("Results: {:?}", results)))
+    }
 }
 
-fn start(opts: &cli::Opts) -> Result<()> {
-    let handler = warp::path::full().and_then(handler);
-    let serve = warp::serve(handler).run(([127, 0, 0, 1], opts.port));
+async fn start(opts: &cli::Opts) -> Result<()> {
+    let state = Arc::new(State {
+        page_store: Arc::new(tokio::sync::RwLock::new(
+            index::Index::new(Box::new(page::store::FsStore::new(opts.path.clone())?)
+                as Box<dyn page::store::StoreMut + Send + Sync>)
+            .await?,
+        )),
+    });
+    let handler = warp::any()
+        .and(with_state(state))
+        .and(warp::path::full())
+        .and_then(handler);
     info!("Listening on port {}", opts.port);
-
-    tokio::runtime::Runtime::new().unwrap().block_on(serve);
+    let _serve = warp::serve(handler).run(([127, 0, 0, 1], opts.port)).await;
 
     Ok(())
 }
@@ -39,7 +79,38 @@ fn main() -> Result<()> {
     env_logger::init();
     let opts = cli::Opts::from_args();
 
-    start(&opts)?;
+    tokio::runtime::Runtime::new()
+        .unwrap()
+        .block_on(start(&opts));
 
     Ok(())
 }
+
+/*
+async fn handle_rejection(
+    err: warp::Rejection,
+) -> Result<impl warp::Reply, std::convert::Infallible> {
+    use warp::http::StatusCode;
+    let code;
+    let message;
+
+    if err.is_not_found() {
+        code = StatusCode::NOT_FOUND;
+        message = "NOT_FOUND";
+    } else if let Some(DivideByZero) = err.find() {
+        code = StatusCode::BAD_REQUEST;
+        message = "DIVIDE_BY_ZERO";
+    } else if let Some(_) = err.find::<warp::reject::MethodNotAllowed>() {
+        // We can handle a specific error, here METHOD_NOT_ALLOWED,
+        // and render it however we want
+        code = StatusCode::METHOD_NOT_ALLOWED;
+        message = "METHOD_NOT_ALLOWED";
+    } else {
+        // We should have expected this... Just log and say its a 500
+        eprintln!("unhandled rejection: {:?}", err);
+        code = StatusCode::INTERNAL_SERVER_ERROR;
+        message = "UNHANDLED_REJECTION";
+    }
+
+    Ok(warp::reply::with_status(message, code))
+}*/
diff --git a/src/page.rs b/src/page.rs
index a40cbbb..9390caf 100644
--- a/src/page.rs
+++ b/src/page.rs
@@ -1,4 +1,4 @@
-mod store;
+pub mod store;
 
 use lazy_static::lazy_static;
 pub use store::{InMemoryStore, Store, StoreMut};
@@ -8,6 +8,7 @@ use digest::Digest;
 
 pub type Id = String;
 pub type Tag = String;
+pub type TagRef<'a> = &'a str;
 
 const TAGWIKI_PAGE_ID_KEY: &str = "tagwiki-page-id";
 
diff --git a/src/page/store.rs b/src/page/store.rs
index b0dade8..e59a002 100644
--- a/src/page/store.rs
+++ b/src/page/store.rs
@@ -1,46 +1,125 @@
 use crate::page::{self, Id};
 use anyhow::{format_err, Result};
+use async_trait::async_trait;
 use std::collections::HashMap;
-// use std::sync::{Arc, Mutex};
+use std::sync;
 
 pub mod fs;
+pub use fs::FsStore;
 
+#[async_trait]
 pub trait Store {
-    fn get(&self, id: Id) -> Result<page::Parsed>;
-    fn put(&self, page: &page::Parsed) -> Result<()>;
-    fn delete(&self, id: Id) -> Result<()>;
-    fn iter<'s>(&'s self) -> Result<Box<dyn Iterator<Item = Id> + 's>>;
+    async fn get(&self, id: Id) -> Result<page::Parsed>;
+    async fn put(&self, page: &page::Parsed) -> Result<()>;
+    async fn delete(&self, id: Id) -> Result<()>;
+    async fn iter<'s>(&'s self) -> Result<Box<dyn Iterator<Item = Id> + 's>>;
 }
 
+#[async_trait]
 pub trait StoreMut {
-    fn get(&mut self, id: Id) -> Result<page::Parsed>;
-    fn put(&mut self, page: &page::Parsed) -> Result<()>;
-    fn delete(&mut self, id: Id) -> Result<()>;
-    fn iter<'s>(&'s mut self) -> Result<Box<dyn Iterator<Item = Id> + 's>>;
+    async fn get(&self, id: Id) -> Result<page::Parsed>;
+    async fn put(&mut self, page: &page::Parsed) -> Result<()>;
+    async fn delete(&mut self, id: Id) -> Result<()>;
+    async fn iter<'s>(&'s self) -> Result<Box<dyn Iterator<Item = Id> + 's>>;
 }
 
+#[async_trait]
 impl<T> StoreMut for T
 where
-    T: Store,
+    T: Store + Send + Sync,
 {
-    fn get(&mut self, id: Id) -> Result<page::Parsed> {
-        Store::get(self, id)
+    async fn get(&self, id: Id) -> Result<page::Parsed> {
+        Store::get(self, id).await
     }
 
-    fn put(&mut self, page: &page::Parsed) -> Result<()> {
-        Store::put(self, page)
+    async fn put(&mut self, page: &page::Parsed) -> Result<()> {
+        Store::put(self, page).await
     }
 
-    fn delete(&mut self, id: Id) -> Result<()> {
-        Store::delete(self, id)
+    async fn delete(&mut self, id: Id) -> Result<()> {
+        Store::delete(self, id).await
     }
 
-    fn iter<'s>(&'s mut self) -> Result<Box<dyn Iterator<Item = Id> + 's>> {
-        Store::iter(self)
+    async fn iter<'s>(&'s self) -> Result<Box<dyn Iterator<Item = Id> + 's>> {
+        Store::iter(self).await
     }
 }
 
-// impl Store for Arc<Mutex<InMemoryStore>> {}
+#[async_trait]
+impl StoreMut for Box<dyn StoreMut + Send + Sync> {
+    async fn get(&self, id: Id) -> Result<page::Parsed> {
+        (**self).get(id).await
+    }
+
+    async fn put(&mut self, page: &page::Parsed) -> Result<()> {
+        (**self).put(page).await
+    }
+
+    async fn delete(&mut self, id: Id) -> Result<()> {
+        (**self).delete(id).await
+    }
+
+    async fn iter<'s>(&'s self) -> Result<Box<dyn Iterator<Item = Id> + 's>> {
+        (**self).iter().await
+    }
+} /*
+  impl<T> Store for sync::Arc<sync::Mutex<T>>
+  where
+      T: StoreMut,
+  {
+      fn get(&self, id: Id) -> Result<page::Parsed> {
+          self.lock().expect("locking").get(id)
+      }
+
+      fn put(&self, page: &page::Parsed) -> Result<()> {
+          self.lock().expect("locking").put(page)
+      }
+
+      fn delete(&self, id: Id) -> Result<()> {
+          self.lock().expect("locking").delete(id)
+      }
+
+      fn iter<'s>(&'s self) -> Result<Box<dyn Iterator<Item = Id> + 's>> {
+          Ok(Box::new(
+              self.lock()
+                  .expect("locking")
+                  .iter()?
+                  .collect::<Vec<_>>()
+                  .into_iter(),
+          ))
+      }
+  }
+  */
+
+#[async_trait]
+impl<T> Store for sync::Arc<tokio::sync::RwLock<T>>
+where
+    T: StoreMut + Sync + Send,
+{
+    async fn get(&self, id: Id) -> Result<page::Parsed> {
+        self.read().await.get(id).await
+    }
+
+    async fn put(&self, page: &page::Parsed) -> Result<()> {
+        self.write().await.put(page).await
+    }
+
+    async fn delete(&self, id: Id) -> Result<()> {
+        self.write().await.delete(id).await
+    }
+
+    async fn iter<'s>(&'s self) -> Result<Box<dyn Iterator<Item = Id> + 's>> {
+        // TODO: fix that `collect`
+        Ok(Box::new(
+            self.write()
+                .await
+                .iter()
+                .await?
+                .collect::<Vec<_>>()
+                .into_iter(),
+        ))
+    }
+} // impl Store for Arc<Mutex<InMemoryStore>> {}
 
 #[derive(Debug, Default)]
 pub struct InMemoryStore {
@@ -61,8 +140,9 @@ impl InMemoryStore {
     */
 }
 
+#[async_trait]
 impl StoreMut for InMemoryStore {
-    fn get(&mut self, id: Id) -> Result<page::Parsed> {
+    async fn get(&self, id: Id) -> Result<page::Parsed> {
         Ok(self
             .page_by_id
             .get(&id)
@@ -70,7 +150,7 @@ impl StoreMut for InMemoryStore {
             .ok_or_else(|| format_err!("Not found"))?)
     }
 
-    fn put(&mut self, page: &page::Parsed) -> Result<()> {
+    async fn put(&mut self, page: &page::Parsed) -> Result<()> {
         *self
             .page_by_id
             .get_mut(&page.headers.id)
@@ -79,13 +159,13 @@ impl StoreMut for InMemoryStore {
         Ok(())
     }
 
-    fn delete(&mut self, id: Id) -> Result<()> {
+    async fn delete(&mut self, id: Id) -> Result<()> {
         self.page_by_id
             .remove(&id)
             .ok_or_else(|| format_err!("Not found"))?;
         Ok(())
     }
-    fn iter<'s>(&'s mut self) -> Result<Box<dyn Iterator<Item = Id> + 's>> {
+    async fn iter<'s>(&'s self) -> Result<Box<dyn Iterator<Item = Id> + 's>> {
         Ok(Box::new(self.page_by_id.keys().cloned()))
     }
 }
diff --git a/src/page/store/fs.rs b/src/page/store/fs.rs
index fcf2e94..d456ea1 100644
--- a/src/page/store/fs.rs
+++ b/src/page/store/fs.rs
@@ -1,5 +1,6 @@
 use crate::page::{self, Id};
-use anyhow::{format_err, Result};
+use anyhow::{format_err, Context, Result};
+use async_trait::async_trait;
 use std::collections::HashMap;
 use std::ffi::OsString;
 use std::io::Read;
@@ -19,7 +20,7 @@ impl FsStore {
             ..Self::default()
         };
         for entry in walkdir::WalkDir::new(&s.root_path) {
-            match Self::try_reading_page_from_entry(&s.root_path, entry) {
+            match Self::try_reading_page_from_entry_res(entry) {
                 Ok(Some((page, path))) => {
                     s.id_to_path.insert(page.headers.id.clone(), path.clone());
                     s.path_to_page.insert(path, page);
@@ -62,11 +63,17 @@ impl FsStore {
         path
     }
 
-    fn try_reading_page_from_entry(
-        root_path: &Path,
+    fn try_reading_page_from_entry_res(
         entry: walkdir::Result<walkdir::DirEntry>,
     ) -> Result<Option<(page::Parsed, PathBuf)>> {
         let entry = entry?;
+        Self::try_reading_page_from_entry(&entry)
+            .with_context(|| format!("While reading path: {}", entry.path().display()))
+    }
+
+    fn try_reading_page_from_entry(
+        entry: &walkdir::DirEntry,
+    ) -> Result<Option<(page::Parsed, PathBuf)>> {
         if !entry.file_type().is_file() {
             return Ok(None);
         }
@@ -75,7 +82,7 @@ impl FsStore {
             return Ok(None);
         }
 
-        let file = std::fs::File::open(PathBuf::from(root_path).join(entry.path()))?;
+        let file = std::fs::File::open(PathBuf::from(entry.path()))?;
         let mut reader = std::io::BufReader::new(file);
         let mut source = page::Source::default();
         reader.read_to_string(&mut source.0)?;
@@ -91,15 +98,16 @@ impl FsStore {
     }
 }
 
+#[async_trait]
 impl page::StoreMut for FsStore {
-    fn get(&mut self, id: Id) -> Result<page::Parsed> {
+    async fn get(&self, id: Id) -> Result<page::Parsed> {
         self.id_to_path
             .get(&id)
             .and_then(|path| self.path_to_page.get(path).cloned())
             .ok_or_else(|| format_err!("Not found"))
     }
 
-    fn put(&mut self, page: &page::Parsed) -> Result<()> {
+    async fn put(&mut self, page: &page::Parsed) -> Result<()> {
         let path = if let Some(path) = self.id_to_path.get(&page.headers.id) {
             path.clone()
         } else {
@@ -113,7 +121,7 @@ impl page::StoreMut for FsStore {
         Ok(())
     }
 
-    fn delete(&mut self, id: Id) -> Result<()> {
+    async fn delete(&mut self, id: Id) -> Result<()> {
         let path = self
             .id_to_path
             .get(&id)
@@ -125,7 +133,7 @@ impl page::StoreMut for FsStore {
         Ok(())
     }
 
-    fn iter<'s>(&'s mut self) -> Result<Box<dyn Iterator<Item = Id> + 's>> {
+    async fn iter<'s>(&'s self) -> Result<Box<dyn Iterator<Item = Id> + 's>> {
         Ok(Box::new(self.id_to_path.keys().cloned()))
     }
 }