The Mantis

Faced with multiple unsolved murders, a police commissioner turns to imprisoned serial killer Jeanne Deber and her estranged son for assistance.

A furious Damien suspects that his mother is up to something, while a clue discovered on Severin's computer leads the team to the next potential victim.

Damien uncovers a secret that sends him back to his childhood home. Lucie cannot shake her suspicions and digs into her husband's past.

The Mantis prepares her next move and Achille discovers a clue that links the victims. Later, Damien visits his mother's psychiatrist.

Jeanne is sent a live video stream of the next victim, and the team race to stop a murder. New clues to the killer's identity continue to emerge.

With his family in danger, Damien contemplates an offer from the killer. A rescue operation takes an unexpected turn.