In a luxurious seaside villa, a modest young woman finds herself in the company of a strange family: an unknown and wealthy father, his extravagant wife, his daughter, an ambitious woman, a rebellious teenager, and their creepy maid. Someone is lying. Between suspicions and lies, a mystery grows and the evil spreads.

Four teenage friends, on the French-Swiss border, whose lives are turned upside down by an experiment of the LHC, the world's biggest particle collider.