After Philippe's body is discovered at the bottom of the river, Yasmina's father is immediately suspected. His daughter thinks it's because he's Arab. Pierre is overwhelmed by events. The young people understand that it's up to them to solve this case. Yasmina's father is out of the question. It was the ouija board that started it all. They have to open a certain tomb in order to lift the curse. What they don't know is the terrible tragedy that happened in the city at the end of the war, to which all the events seem linked.