Philippe Mars is a pleasant 40-something whose meeting with a psychotic college friend who is in search of love profoundly changes his life.

A woman has disappeared. The day after a snowstorm, her car is found on a road leading to a plateau with with nothing but a few scattered farms. The gendarmes have nothing to go on, while five individuals well know they have something to do with the woman's disappearance. They all keep their secrets to themselves, but no one suspects that the whole story began far from these windswept wintry peaks: on another continent, in the burning sun, where poverty doesn't stop desire from taking the law into its own hands.

Young and ambitious Captain Vivés has just been appointed group leader at the Grenoble Criminal Squad when Clara's murder case lands on his desk. Vivés and his team investigate Clara's complex life and relations, but what starts as a professional and methodical immersion into the victim's life soon turns into a haunting obsession.