Killer by the Lake

The corpses of two women are found - one right after the other - in the lakeside town of Annecy, and married police officers Lise and Clovis have no doubt that it must be the work of a serial killer.

Lise and Clovis find a third corpse and deduce that the woman was probably the killer's first victim. Meanwhile, Marianne's nursing assistant Marthe is corresponding with a man on a dating site who is actually the killer.

Lise asks her mother Marianne to come and live with her family. As the killer continues to ensnare women, Clovis and Lise's teams work hard to understand his operating methods and attempt to trap him.

The police take the risk of setting a new trap for the killer using an officer on Clovis's team as bait. Lise's research makes her doubt her husband's honesty. Has Clovis been leading a double life?

Unimpressed by local efforts to catch the lake killer, the prosecutor appoints a new senior officer, Diane Varella, to oversee things. Lise wants Clovis to explain himself, but he won't respond.

Clovis confesses a deeply held secret to Lise, who learns about the dark side of his past. The new chief of the investigation, Diane Varella, follows up leads to find the leak in the police force.

As Clovis is questioned by Varella, Lise and her team try to prove he's not guilty. They begin to suspect Lise's psychotherapist, as she's been confiding in him since the start.

Lise, Clovis, and their teams learn that Varella has disappeared and suspect she has been abducted by the lake killer. They follow a lead that brings them to a hideout, but are they in time to save her?