After the victory of the Iranian revolution, a SAVAK colonel pretends to be died and hides himself. His son, Ramin, who has been studying abroad and always has thought of his father as a regime opponent, returns to the country. Ramin is unaware of the fact that he was a mediator for his father to identify the militants of the revolution. A young servant of the house was a victim of Ramin's collaboration with his father and now he tries to take revenge. Some events come up and Ramin finds out about the truth, so he decides to arrest his father; but the latter escapes by a train. Ramin pursues him and before he reaches him, the protesters arrests him.