Assigned by his boss, Thurston (Vernon Dobtcheff), to investigate suspicious businessman Antoine Gardella (Jacques Dutronc), Interpol policeman Christophe Vade (Patrick Bruel) arrives in Zurich, allegedly to look into the murder of Gardella's parents. Warmly welcomed by his suspect, who is highly regarded in the community, Vade is soon drawn into Gardella's world, growing closer to the man's wife, Jeanne (Mathilda May), and finding it harder to concentrate on his task.