While preparing for the Olympics, gymnast Justine Petrini is accused of stealing Napoleon Bonaparte's death mask from the Masséna Museum, leaving a collateral victim... Tom doesn't believe she's capable of murder, she could be his daughter, Zoé, with whom the lawyer is gradually reconnecting! Resourceful, Sigourney tracks down Salvatore de Santis, Anna's brother, one of the last people to have seen her alive...

The body of Noémie Glassman, a famous soprano, is found at the Nice Opera. Her murderer seems to have been found: Jojo, the owner of the palace and Tom's friend, discovered the victim and left her DNA in the dressing room. Could it be a set-up? Tom, Sigourney and Simon investigate but they have other worries. A hitman is chasing Tom. Time is running out, he must prove his innocence in the Peter Marks case, before he gets murdered! Zoé comes to his aid by diving back into her mother's files...