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...