Abigail Dalton and Bridger Flynn have been handed another big cold case to solve for Portland PD, this one involving Jonathon Makepeace, one of the city's richest men, and his wife, the police commissioner. The victim was Jonathon's girlfriend. She died while on a role-playing getaway where virtually everyone was in disguise, pretending to be the survivors of the apocalypse. All of the weapons were supposed to be props, but one of them was very real. And, while everyone else was merely playing, the killer was deadly serious.