One day, Jean-Louis discovers that his heart has stopped. He is not dead, can walk and talk, but his heart is no longer beating. With the help of his wife and a friend, he tries to understand the origin of this mystery.

Claire, a 50-year-old divorced teacher, creates a fake Facebook profile of a 24-year-old woman. She finds a photo of a pretty young brunette and uses it. She has created an entirely fictional character, but why?