When the decomposed body of 13-year-old Katie Pine is found in an abandoned mine shaft, Detective John Cardinal is vindicated. He'd kept the Pine case open, and was demoted for his zeal. But Katie isn't the only youngster to disappear in the Canadian town of Algonquin Bay. Cardinal is allowed to reopen the files on three other lost kids. When another youth goes missing, he sees a pattern that screams "serial killer."