The group realizes that the Zombie infection may not be an infection at all. Billy, conflicted by his Irish Catholic guilt, needs to confront his demons and he seeks out the advice of a childhood mentor. Meanwhile, Bates decides to leave the group and goes off on his own in order to liquidate some of the assets he acquired when they dealt with the militia. However, he soon learns that there's greater safety in numbers when he tries to make a new deal with a house full of sociopaths.