The Lock (1982)

Muftah is dismissed from his job as a teacher despite his efficiency. He meets an old classmate called Sharif, the owner of a boutique and works for him. Due to his misbehavior that leads to great financial losses to the store, Sharif is forced to dismiss him from the job, but he uses him to monitor his wife Farida for a large sum, while he is traveling to spend a week with his girlfriend dancer Ejlal.