Laurent, a childhood friend of Camille and an untalented artist, meets Thérèse. The two of them have an affair and plan to kill Camille so they can be with each other. They do this by pushing him off a boat into the Seine River. Everyone believes that Camille's drowning is an accident. Thérèse and Laurent then marry each other. However, they are haunted by their actions. Laurent becomes a talented artist but his paintings remind him of Camille.