Emilie has moved to the countryside with her partner, Gabriel. In the next field, a black horse is lying, dead. No one seems to care.

Leïla is late. But not any kind of delay : her period is late. This is going to be hell.

Confident Marion works at a seaside town as a lifeguard. Although she rather avoids others, she meets shy Elise. Yet when Elise starts drowning one day, it triggers not Marion’s lifesaving instinct, but a dark desire. And it changes not only her own life.

Paris, France, December 1897. The young playwright Edmond Rostand feels like a failure. Inspiration has abandoned him. Married and father of two children, desperate and penniless, he persuades the great actor Constant Coquelin to perform the main role in his new play. But there is a problem: Coquelin wants to premiere it at Christmas and Edmond has not written a single word.

Denis struggles to raise his boisterous daughters Janine and Mercredi on his own while holding down two jobs. Everything goes sour when Denis forgets Mercredi one too many times at the school gates. Séverine, a cheerful social worker, is appointed to scrutinize the family’s daily lives.

Aurélie and Célia are friends studying at the École des Beaux-Arts. One day Aurélie falls for the charms of Olivier, a handsome architecture student. Célia warns her friend of Olivier's bad reputation with women, but Aurélie lies to her, saying that she's not interested in him and doesn't mention that she has agreed to go on a date with him.

In a small town of France, Martin shares his everyday life between his family and the local brass band. At the fanfare, Francis disturbs his well-ordered life. To stop the impulses, Martin will try to go to the end of his fantasies.

Murders in... is a collection of French-Belgian police TV movies taking place each time in a different French city and region.