diff --git a/killstream/ip_whitelist.py b/killstream/ip_whitelist.py
index d904ab9..80e25fc 100644
--- a/killstream/ip_whitelist.py
+++ b/killstream/ip_whitelist.py
@@ -1,6 +1,10 @@
 # -*- coding: utf-8 -*-
 
 '''
+Receive session_key and IP from PlexPy when playback starts. 
+Use IP to check against whitelist.
+If not in whitelist use session_key to determine stream and kill.
+
 PlexPy > Settings > Notification Agents > Scripts > Bell icon:
         [X] Notify on playback start
 PlexPy > Settings > Notification Agents > Scripts > Gear icon: