Laure is 10 years old. Laure is a tomboy. On her arrival in a new neighborhood, she lets Lisa and her crowd believe that she is a boy. Truth or dare ? Dare.Summer becomes a big playground and Laure pretends to be Michael, a boy like the others... different enough to get the attention of Lisa who falls in love with him. Laure takes advantage of her new identity as if the end of the summer would never reveal her unsettling secret.