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.

The lives of the four friends Bilal, Romane, Samuel and Victor are completely turned upside down when a mysterious event ensures that they are torn from their world and that each of them finds themselves in a different parallel world. Each of the four do everything possible to understand what exactly happened and look for a way to return to their original homeworld.