Mady is a student by day and a locksmith by night. One evening, he helps Claire, an enigmatic young woman who isn't who she says she is. The door isn't to her apartment, and the bag she's desperate to retrieve isn't hers, but that of Yannick, a man that Mady must answer to. Caught in a hellish chase, Mady has just one night to prove his innocence in a city in turmoil.