Since a deadly virus wiped out his parents and his community, Finn has lived alone on the rugged coast. He has stayed alive for two winters—hunting and fishing and trading food, and keeping out of sight of the Wilders, an armed and dangerous gang that controls the north. But Finn’s isolation is shattered when a girl runs onto the beach. Rose has escaped from Ramage, who had enslaved her and her younger sister, Kas. Rose is desperate, sick, and needs Finn’s help.