It always happens at the same time. The ringing of a bell in my head, which I have heard twice a day since childhood. Over the years, it becomes louder, causing me unbearable pain. My friend Margaret called me to the island of Saint-Malo to recover from her illness, but strange things are happening there... On the very first day she disappeared. Then the mysterious stranger said that he would show where she was if I agreed to play a game with him. Every morning I will wake up in the body of one of the inhabitants of the island in order to unravel the mystery of the crime in which they are all involved.