Secrets (2007)

A woman falls through a sky window in a fancy Bordeaux hotel during a gala; she survives, but suffers from amnesia. The commissioner in charge works on the assumption she was a hired gun, the list of four female names found on her being her targets: a homemaker, a surgeon, and two employees. While trying to protect them, the police discover that they all have secrets, some of which they tell one another as they become friends. But little is what it seems.