Set in a time where a mysterious illness has killed all the adults. The town of Potter's Bluff has been divided into two rival factions, the 'East Side', made up of scrappy scavengers living amongst the ruins, and the 'West Side', which hoards its wealth in the former high school and is ruled by brutal dictator, Jeremy. When Jack, an Eastsider, is forced to kill two Westsiders while on a scavenging mission, he is captured and taken back to the West Side where he awaits public execution. Jack's sister, Nat, and her best friend, Scratch, must cross into dangerous territory if they hope to save him. Their treacherous journey reveals not only the power of their love, but the depths of their courage.