One evening, Mady – a young student by day, a locksmith by night – receives an emergency call from Claire to open a lock. But the door the young woman wants to open is not hers, and the bag she runs away with is not hers either. It belongs to Yannick, a vicious gangster who accuses Mady and will stop at nothing to retrieve her stolen goods. Mady has only one night to prove her innocence and save her life. What started as a normal night shift turns into brutal violence.