The body of Vicky, a teenage girl, is fished out of the river.

The Investigation Unit searches for a suspect in the kidnapping of Romane and Audrey.

In an abandoned house, five corpses are found by a woman who is searching for her daughter.

The Unit mobilises to apprehend the killer before the list of his victims grows longer.

An incarcerated murderer wishes to apologise to the families of his 12 victims before dying.

Patrick Lacenaire continues his efforts to obtain his pardon.

The Investigations Unit continues its research to find Vicky's killer.

The Investigations Unit perseveres to find Adèle and unravel the mystery.

The serial killer is still on the run and the Unit discovers his involvement on a forum.

After a girl is kidnapped and then recovered, she refuses to reveal the identity of her captor.