Four friends go to a party before the Christmas holidays; but Vinca cancels and later, in distress, calls Thomas.

Thomas and Max visit Francis to tell him the police have found Clement's body; Francis says he has engaged a Russian gang to recover the evidence.

Francis is kidnapped; Fanny admits that Vinca asked her to take pictures to blackmail Richard.

Max breaks down and confesses to Annabelle; when Thomas looks to find traces of the other Alexis, he finds traces of a secret house, belonging to Francis and Annabelle, and more.

Thomas is in mourning, his father is dead and his half-brother is in a coma; he no longer understands anything and Annabelle tells him Fanny has all the answers.

We go back 25 years and finally experience the events from Vinca's point of view; back in the present, Annabelle confronts DeVille with a gun about the attacks on Francis, Ahmed and Max.