Alexandre finds out his wife Juliette is cheating on him. They quarrel with each over, Juliette runs away during the night, and has a fatal fall. The next day, torrential rain have taken her body away. The police force is investigating and Patrick, Juliette's father, shows up to find out what happened. Fearing to be charged, Alexandre convinces his 18 years old daughter Lison to cover him. But his lies make things worse, and Patrick has doubts about him. It's the beginning of a dreadful chain of events.