The Key

A bankrupt businessman and his wife attempt a rail suicide, but the wife's change of heart make it fail. They have already abandoned their newborn daughter who is picked up by a street sweeper and raised in his family. Years later, she runs away from the home searching for a better life and a job...

At a party, Kian, the famous composer, is drawn to Pari's singing and takes her from Ahvaz to Tehran.