Vincent and Rebecca fall in love at first sight in a cybercafé. They are young, barely 18 years old, and have a carefree attitude to life. And yet, two months later, Vincent’s body is found floating in the River Rhône, and Rebecca is missing. Lt Hervé Cagan and his partner Karine Mangin are in charge of the investigation. As they retrace Vincent and Rebecca’s doomed love affair, Hervé and Karine find themselves confronted with the flaws in their own lives.