Five close friends, all of them married, share a loft to meet their mistresses. One day they find the body of a young woman in the loft. Since there are only five keys to the loft, the five men begin to suspect each other of murder.
14-year-old Elias increasingly feels like an outsider in his village. When he meets his new neighbour of the same age, Alexander, Elias is confronted with his burgeoning sexuality.
Businessman Christian Vandenheuvel planned to spend the long weekend with his young mistress, Lisa. Instead, they're take hostage by Jos Diels and Nick, two of the 46 laborers who lost their job recently when Christian had his family film bankrupted. Each victim fails to escape, even the fire alarm doesn't get them freed. After Jos realizes the mistress is his only daughter, and Nick falls in love with Lisa, the masked men's mood evolves as they progress to truth time, when the police arrives.
In a world hit by a wave of mutations transforming humans into animals, François does everything he can to save his wife. As some of the creatures disappear into a nearby forest, he and their son Émile embark on a quest that will change their lives forever.