When a massive explosion at a top-secret prison known as the Pit allows notorious serial killer Richard Harris to escape, disgraced FBI agent Bex Henderson is called back into action to hunt him down before he kills again.

In rural Montana, the team hunts down Lowe, a brutal serial killer obsessed with wolves. Bex and the team must track Lowe through the wilderness, all while dealing with local Rangers out for their own form of vigilante justice.