On what should have been an unremarkable holiday, nine young people gather at a secluded estate known as Cyrille's House. Wealthy, restless, and driven by motives none of them dare speak aloud, they agree to play a game - a deadly one, with rules of their own invention.Then something goes wrong.Terribly wrong.Days later, the bodies are discovered under circumstances no one can explain. What appeared to be nothing more than a morbid thrill collapses into one of the most disturbing cases ever put before an investigation team. How could so many of them have died within the same game? And more urgently - what happened in those final minutes, when there should have been no one left alive to witness anything at all?As detectives work to reconstruct the sequence of events, a crucial piece of evidence surfaces: a manuscript left behind by one of the victims. A near-real-time account that lays bare the secrets, tensions, and dangerous entanglements binding these young people together - right up until the moment the narrative simply... stops.The truth, however, does not live in what was written.It lives in what was left out.And someone, inside that house, knew exactly how it would all end.