Bombay Police are baffled by a series of crimes - all at the hands of arch-criminal "Black Cat" who leaves his calling card at every scene of the crime. The Commissioner assigns this matter to this best plainclothes agent, Rajan. Rajan's investigations lead him to suspect Professor Gupta, who is also the brother of his girlfriend, Nita. Rajan decides to use Nita's love for him, and spies on Gupta. When Nita finds out, she is enraged at Rajan, and blames the police who she feels are covering-up their inefficiency by making a scape-goat of an innocent man. Rajan fails to prove that Gupta is somehow involved with "Black Cat", and the Commissioner gives him a deadline. If Rajan does not apprehend Black Cat within that deadline, he may be suspended or even dismissed from the police force. With no clues whatsoever as to the whereabouts of Black Cat and it's gang, Rajan has the challenge of his life, which he may not be able to fulfill.

Rajan, a wealthy Basantpur man, accidentally causes Shanti's vision loss with face afire. He becomes an eye surgeon, but his friend Ramdas is arrested and sentenced to prison.

Young Vikram (Navin Nischol) stands to inherit a fortune. After living in England for the past five years, he returns home to find his family out of control. His stepmother squanders their wealth, and his stepsister loves a hoodlum. Meanwhile, Vikram falls in love with Chanda (Rekha), a sassy village girl. He soon realizes that his family only wants his money and will stop at nothing to get it. Bollywood star Rekha makes her Hindi screen debut.

A poor wood-cutter is rewarded with a gold, but the rejected ruler abducts his mother for ransom.

Vishal (Rishi Kapoor) comes from a wealthy Hindu family. His father is well known Chandraprakash Singh (Amrish Puri), and his mom is a housewife, Sharda (Asha Parekh). Vishal falls in love with a young Catholic girl, Ruby Miranda (Farha). While Ruby's dad (Alok Nath) approves of the marriage, Chandraprakash does not, and will not even hear of his son marrying someone not of equal status in wealth, leave alone a different religion. He is all the more enraged when he learns that Vishal is not really his son.