One night, Mady, a young student by day and 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 neither is the bag she is running away with. It belongs to Yannick, a ruthless gangster who blames Mady and will stop at nothing to get his stolen goods. Mady has only one night to prove her innocence and save her life. What started as a routine night shift turns into a brutal descent into violence.