The film stars Amitabh Bachchan, Sharmila Tagore, Amjad Khan, A. K. Hangal, Iftekhar, Nirupa Roy and Deven Verma.

When Ramachandra's simple and obedient son Ram Kumar (Amitabh Bachchan), an insurance agent, sets out to find the truth about his father's death, he faces many difficulties.

Pretending to be a decent industrialist named Dharamdas, Digviyay engages in dubious activities like smuggling drugs and running other crimes and becomes a powerful man who keeps poisonous snakes to kill his enemies and traitors.

Finding himself in a dangerous battle with the criminal underworld Ram Kumar resolves to fight against injustice and joins forces with the Police Commissioner (Iftekar).

Transforming himself into Prince Chandrashekar, a diamond businessman from South Africa, Ram Kumar woos Dharmdas's beloved Manju (Bindu) and gets close to her.