A psychopath wakes up in an asylum and must become a monster hunter during the Apocalypse, but he doesn't know if he's in the Apocalypse, killing people and thinks it's the Apocalypse, or it's all in his head the whole time.
Ichabod is in a bad way as he's captured by a group of survivors that are sure he's a zombie sympathizer, and if forced into their service to save his friends.