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.

They come from all over the world but they have one thing in common The Foreign Legion, their new family. The film tells their stories of women struggling to keep their love alive, men who leave for battle, and couples forming on hostile ground.

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.