Summary Bernard and Nadine are in charge of a fire in the apartment of a young couple ,Florien and Mina Ferlet: the firemen speak about an arson,because somebody burned the doormat of the apartment.About menaces they remember that a former neighbor,Pascale Mayereau had menaced them some months ago.Mrs. Pascale Mayereau arrives at the police station and comments that a third person, a woman was often in the apartment ("ménage à trois" as the French people say).Rayann Bakir is interrogating a baby sitter because the child had an intoxication (listeria bacteria) and she tells him that they have found the milk with chocolate in a dustbin.Maxime and the new trainee Lou are in charge of the theft of musical equipment, a female singer complains that several materials have been stolen.Recently she had a difference with the hall manager who denies to have confiscated or stolen the equipment.Maxime tells him that the police knows that he is selling alcohol during the concert without a license: so the stage manager remembers that somebody entered the hall through the basement where he is hiding bottles of liquors.

• Crime
• Thriller