The Carriage Driver (1971)

Original title: درشکه چی

A carriage driver who managed to become a taxi driver is in love with his sister-in-law. They were in love when they were young, but both married other people. Now that they are both widowed, they want to realize their dream and get married. The son of the sister-in-law is opposed to this marriage on principle, but he himself is in love with the carriage driver's daughter. The uncle and his nephew are going to challenge each other.