Sadegh and his wife manage a tea house in the way between Ahvaz and Andimeshk south of Iran. One night in his absence a friend of him who is a truck driver comes to his place and the wife is getting killed. The police are after the murderer but Sadegh who seeks revenge begins to kill the truck drivers on the way. This put him in fronting the law.
A professor who found out a formula to make diamonds from oil is killed in Tehran and his nephew who is a spy is sent to Tehran by Interpol in order to find the formula.
