Spectacle immersif : "La Réserve du Collectionneur"

About

For Halloween, the Cheval Pimpant, a games bar manor, invites you to its immersive show: "The Collector's Reserve" You read a strange advertisement in this month's newspaper: the Collector invites anyone to come visit his private collection in his manor and discover his most mystical and rarest pieces. So you called the number in the advertisement and were given an address and a time. Nothing else. What on earth could it possibly be hiding that's so extraordinary?