"Un Crime" takes place over a single night, between 10pm and 6am. It takes place in a single setting - a millionaire's apartment in Lyon. The film is about the conflict between two men, alone, face to face in the closed world of the apartment. The first man is a famous lawyer named Dunand. The second is Frédéric Chapelin-Tourvel, Dunand's rich client, twenty years his junior. Throughout the night, Dunand tries to track down the truth. Did Frédéric kill his father and mother, in particularly barbarous circumstances ?

France, 1940. German troops have just invaded the country, but in the rural idyll of the family chateau inhabited by 20-year-old Mellie with her impoverished aristocrat father Alexandre and adolescent cousin Robinson, the war still seems far away, apart from the fact that Mellie's rich and unpopular fiancé André has been drafted into the army. For Robinson and his friends the same age, including the temperamental Bertrand, the war is merely a game they play in the remoteness of the blue island in the lake.

Friends gathered at a remote chalet in the French Alps for a summer getaway are caught in a deadly trap as a dark secret from the past comes to light.

Arnaud and Guillaume are in their last year of high school. Summer is approaching and like any teenager, they're thinking about cigarettes, alcohol and sex. But boys or girls? Future looks so blurry when you're a teenager!