Don (Amitabh Bachan) is the most wanted international smuggler, on the list of interpole, is the most powerful man in the world of crime. Don is completely merciles even towords his own man. Ramesh who work for Don decides to leave this profission. But Don kills him Ramesh Fiance Kamini (Helen)get completely shettered and decites to take the revrange. DCP D'silvas(Iftikhar)who is on his mission to arrest this restless gangstar plot a plant with the help of Kamini. Kamini seduce Don make him wait in a hotel room, till the police come . The plan fail and Don escaped from sence. As Don oversmart Kamini in the processs Kamini get killed. After the long cast the police did not successed to catch Don. Who is Badly injures and shot D'silves when leave for the headquarter learns that Don is hiding in his car . Don threaten D'silvas at the gunpoint and tell to help him run away . But within few minutes only Don passes away. The secrat Don is dead. is known to D'silvas only.He decided to keep it as a secret so that he can get the information about his whole gangs. D'silvas approaches Jijay (Amitabh in a double role) who is a street dancer and singer and asked him to enter in the Don gangs as Don. Vijay is all alone in the world, agrees to do so, because of the two missing children whom is taking care of Vijaj enter the gang, Pretending that he has lost his memory and keep in touch with D'silvas to give information about the other gang member. Vijay meet Roma(Jeenat Aman)who is also a gang member and work as a shopshooter . Roma is the sister of Ramesh and she has join the gang in order to kill don She mistake Vijay with Don and tries to kill him Vijay who has fall in love with Roma tell her the truth. But some how Vijay relity disclosed in front of all gang member after a police raid. During the police raid D'silvas was killed ,who is the person who know the relity of Vijay. vijay now in big trouble because all the gang member want to kill him and even police think that he is Don . The story has also very thrilling suspence as it goes on.