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 while dealing with local Rangers.

When Bex and the team race to stop Roy Barber, known as the Couples Killer, before he strikes again, they uncover a chilling scheme that puts Roy's crimes in an entirely new light.

The student becomes the master when an escaped serial killer from the Pit decides to adopt another inmate's style of killing as a way of paying homage to them.

Bex and the team hunt their most depraved serial killer yet, Tom Beecher, who seeks pleasure in other people's pain.

Bex and the team track the brilliant and beguiling Jenna Wells, the notorious Killer Chemist whose therapy in the Pit has made her even more dangerous and deranged.