Having finally discovered Boyd, Mina must convince him to come back to the zoo where he and his group of survivors will be safe. But he only agrees on one condition. Other victims of the Dementia Plague live nearby and if Boyd is to join her ranks she'll have to finish off one of his most detestable enemies: Gordo. But with the world swarmed by rotters and nowhere to hide that is ever truly safe, will she succumb to Boyd's plan or fall prey to the undead before she even reaches her target?