Robert d'Eglantine, a specialist in quantum physics, invites five of his friends to spend a weekend in his castle, lost in the woods, and to share in an experiment... According to his calculations, at 11.37pm, a rift will open in the space-time continuum and will send them back seventy years  to May 1944, during the German occupation of France. Is this an academic role playing game or genuine time travel?

The events that will take place during the weekend could change the course of time...