In the night of his wedding, Jafar falls in love with a dancer. He leaves the village for town to find the girl.

After getting to know Shirin, Mehdi helps her to get Ata, who killed her father and is trying to take over the cabaret that belongs to Shirin with fake documents, out of her way. His brother Mahmoud, who studied medicine, returns to Iran, and takes an interest in his cousin Homa, who grew up with them since she was a child. The two decide to get married. But Mehdi's mother opposes Mahmoud's marriage with the argument that her eldest son should get married first.

Three friends, "Farhad," "Reza," and "Ahmad," make a pact in childhood to meet each other twenty years later—in the spring of 1973. By 1974, Reza has become a pickpocket, Farhad is a millionaire, and Ahmad is a police officer. Farhad can inherit his father's vast wealth only if he reconciles with his wife, "Christine," but he is unwilling to do so. Therefore, he attempts to steal the will and, during a struggle, ends up killing the lawyer. The evidence points to Reza as the murderer. Ahmad is assigned to investigate the case...