diff --git a/README.md b/README.md
index 65a8234..e777d06 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,24 @@
 
-   Perplex
-   
\ No newline at end of file
+# Perplex
+
+A Movie Renamer for Plex Metadata
+
+## Overview
+
+This simple Python script for renaming movie files in a Plex database.
+[Plex](http://plex.tv/) is a software suite for organizing videos,
+music and photos.  It can identify movies based on their file names
+and retrieve corresponding metadata.  In practice, however, not all
+file names are appropriate and thus some movies usually need to be
+assigned to the corresponding movie titles manually.  Unfortunately,
+Plex is not able to rename these files and thus if the database is
+initialized from the scratch these files need to be manually fixed
+again.
+
+The Python script `perplex` solves this problem.  Given an
+installation of Plex and the corresponding database, it lists all
+imported movies and renames them according to the retrieved movie
+metadata.  To avoid breaking the current installation, the renamed
+files are copied to another directory.
+
+That's it.
diff --git a/perplex.py b/perplex.py
index 852795e..c82bfd6 100755
--- a/perplex.py
+++ b/perplex.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# Perplex - Plex-base Movie Renamer
+# Perplex - A Movie Renamer for Plex Metadata
 # Copyright (c) 2015 Konrad Rieck (konrad@mlsec.org)
 
 import argparse