The zombie is gone...finally and truly dead. John and Ky try to get on with their lives, but they can't. They are haunted by the past and it's tearing apart their future. With no other options, they go undercover where Sam had worked before he came home...undead: ReGen. They struggle with their circumstances, their fears, and their relationship as they fight to tame their nightmares and create a happy and healthy future together.