Hunting down killers to help bereaved families get justice is more than just a job; it’s a duty for Thomas Bareski, a retired, hotshot police detective eager to reopen unsolved murder cases in a mission to find the culprits.

Chloé Saint-Laurent is a profiler and works with a police team to solve murders in Paris. She's very sweet, she wears very colored clothes and a huge yellow bag. She looks like a little girl who need a doll, but she's very smart and a very good profiler. Step by step, she fit in the team and her colleagues, very reserved at first, became her best friends.

Candice Renoir had put her career on standby for 10 years. When she returns from Singapore to resume service in a port town in the south of France, she feels a bit “rusty”. Despite the obvious defiance of her unit and a cynical superior who doesn’t make her job any easier, she is determined to turn her so-called weaknesses into strengths, solving the most complex cases with her common sense, her acute observation and her practical nature seasoned by a busy daily routine. Only Candice can catch a killer because she knows the chemical composition of a window-cleaning product or determine the hour of a murder from the cooking-time of kebabs… Candice is only naive on the outside, and nobody can resist her!