Robert Millard has based his industrial kingdom - based on all the noise technologies - thanks to his marriage with the wealthy and cantankerous Irene, he blithely cheat for years. However, his last link with his pretty secretary, Eve, is the straw that broke the camel : Irene has indeed hired a detective-photographer, aptly named M.Colle order to have a maximum of incriminating shots. Threatened to divorce and thus to total ruin by his wife, the unfaithful husband should give up and dismiss Eve.

Cyril is doing his Taï-Chi in a corner of the Domaine du Manoir. A golf club slams into the back of his neck, killing him with a deadly blow. The investigation is entrusted to Maud Arthuis, who is more than 8 months pregnant but widowed.

A French family plans to swap homes with a Turkish family for the holidays - but things do not go as planned.

Emma and Adrien are all set for a romantic getaway. But then Adrien is called to investigate a murder, after an instructor is found hanged at the gendarme academy.

Jean-Pierre is a literature professor in Switzerland. Due to the vagarities of Swiss law, he is selected, basically at random, to be the guardian of a parentless teenage boy named Antoine. Conflict comes into the story as Jean-Pierre, who has just accepted a major promotion, must now deal with caring for a teenage boy he doesn't want to care for, as well as handling his own jealous boyfriend. Then his wife steps into the picture. Things get complicated from there as Jean-Pierre tries to get out of his guardianship.

Police captains Emma and Adrien look for a killer who would use a silver bullet… on multiple victims.

Caroline Jeune, a gendarme captain, takes on her first murder. An 18-year-old Kurdish woman, Sabrya, was murdered on her way home from the choir she sang in.