The film is the story of two conmen, Ramesh (I. S. Johar) and Mahesh (Mehmood), whose only life purposes are to make the most money by cheating and theft.

They land in the hands of a high-profile Portuguese dictator (Kamal Kapoor), who wants to blow up India with the formula of an atomic bomb, a Nuclear weapon developed by a scientist of Hong Kong, who is killed along with his daughter by high treasonous thieves in the hope of securing the formula, which, however, the scientist has already secured in a safe deposit locker in the Bank of Hong Kong.

Coincidentally, the scientist's daughter is a look-alike of a girl called Ms. Sonia / Usha Roy (Sonia Sahni), who the dictator wants to act as the deceased patriotic daughter, go to the bank using her identity and take out the formula, to be later secured by him, and misused against India.

Simultaneously, he orders another of his cronies, Ramayan Tiwari, to pursue Ramesh and Mahesh, that they should also become the love interests of Sonia, so that she could be brought to Hong Kong on some pretext or the other.

Repentant Ramesh and Mahesh now becoming totally patriotic, decide to go to Hong Kong with Sonia and catch the culprits who want to inflict such drastic harm to India.