Francis Dupuis is interrogated about the murder of Lea Morel, but he is obviously confused and unclear about details despite his confession. However, when the police search his property they make a surprising and convincing discovery.

The waiting is finally over for the distraught Morel family when Lea's body is found in Miribel lake. As they prepare for the funeral, Julien becomes obsessed with identifying everybody who attended her birthday party on the day she went missing, and manages to identify someone who looks out of place in the club.

An apparent suicide with a long confession seemingly concludes the case of Lea's murder, but Molina is not convinced.

A jeweller identifies the man who bought the pendant found in a grave dug for Lea Morel. The man is questioned, but he has an alibi for the night of the murder. Romain is given a bag of Lea's possessions left at the race track and finds a USB stick with incriminating evidence.

Molina decides that the police have been chasing a red herring and retraces their investigation into Nicolas Barrault. A search of his possessions turns up one of Jenny's business cards with a handwritten note on the back.