Reza is a poor musician who is wandering the streets. One night he finds a baby and with all the difficulties he decides to brings him up. But when the boy's real father becomes aware that his child is alive he decides to take him back.

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...