Claire (Isabelle Carré) works for an insurance company. Laurent Kessler (Benoît Poolvoerde) is a client. When she has to deal with him he tries to seduce her. In spite of her marriage and her daughter she agrees to date him. The more she learns about Kessler, the more his behavior strikes her as strange and she begins to suspect that he might be the serial killer currently making the news for murdering women.
