Drug and arms smugglers in Baluchistan region, through one of their leaders, ask the Captain of the Police "Mansour Yekke Taz" to allow their cargo to pass through the region in exchange for receiving a huge amount of dollars, Captain Yekke Taz agrees and after receiving the money On the promised day, he attacks the smuggling convoy with all his might and arrests them. The smugglers kill Captain in retaliation for this act.

In a meeting in Thailand, it is decided that twenty tons of heroin to be smuggled to Iran and to be pushed in schools, universities, and even the frontline. While the shipment is being moved on Iranian roads, a detective is killed in Tehran. His successor tries to find the shipment with the help from an addicted inmate and his fiancée.

When his business partner is hurt in a car accident, happily married Mahmoud (Fariborz Arabnia) must travel to Tehran, where he falls for the beautiful Sima (Hedye Tehrani). The two agree to a "temporary marriage," but problems arise when Sima doesn't want the arrangement to end. Sima's reluctance to play her expected role in this common Islamic practice soon turns to obsession in this smash hit from Iran.

Jalal who has left his wife, is planning to rob a residential complex. There, he finds out about a bombing conspiracy. The next day he informs the police and he is arrested as the only suspect. Major Hashemi, who is in charge of the case finds some clues finds out that Jalal is innocent after some interrogations. When the conspirators realize that the police are after them, they change their plans. Now, the police has to follow two cases at the same time; that is, helping Jalal and finding the bombing conspiracy at The Tehran International Exhibition Center. ...