In this thrilling entry in Edgar Award finalist Paul Doiron’s bestselling series, a deadly attack on one of Maine’s last wild wolves leads Game Warden Mike Bowditch to an even bigger criminal conspiracy.

While on vacation, Warden Investigator Mike Bowditch receives a strange summons from Billy Cronk, one of his oldest friends and a man he had to reluctantly put behind bars for murder. Billy wants him to investigate a new female prison guard with a mysterious past, and Mike feels honor-bound to help his friend. But when the guard becomes the victim in a brutal attack at the prison, he realizes there may be a darker cover-up at play—and that Billy and his family might be at risk