One night, Mady, a young student by day and a locksmith by night, receives an emergency call from Claire to pick a lock. But the door the young woman wants to open is not hers, and the bag she escapes with is not hers either. It belongs to Yannick, a vicious mobster who accuses Mady and will stop at nothing to recover his loot. Mady has only one night to prove her innocence and save her skin. What began as a simple night watch turns into a brutal descent into violence.