Film about a small-time hood running afoul of a bigtime gangster. Starring Dev Anand, Kalpana Kartik and K.N. Singh.

Set in the early 1960s in a large Indian city. The story of three orphaned children, the eldest of whom, Debu, is twelve years old. Debu does his best to earn money so that his brother and sister do not become homeless vagrants. With the help of kind people, Debu manages to provide for his brother and sister, as well as himself.

Anjana lives a wealthy lifestyle with her dad, Dwarka Nath, in a hilly region in India. When she returns home after several years, she finds that her dad has become more strict and a disciplinarian, and even has his erring employees and villagers flogged. Then she meets with local villager, Jhumroo, and both fall in love with each other. Jhumroo takes her home to introduce her to his mom, Kamla, who approves of her instantly. When Dwarka comes to know about this, he is enraged, and quickly announces her marriage with his Manager, Ramesh. Jhumroo is heart-broken and goes to meet with Anjana, who does tell him that she loves him, but must obey her father. What Jhumroo and Anjana do not know is that she is not Dwarka's daughter, but is the daughter of Kamla, and abducted at a very young age.

About a taxi driver in Mumbai, Mangal, who is called "Hero" by his friends. A driver who drives a cab by day, then drinks at night, listens to his singer girlfriend, Sylive, and then goes into a drunken stupor - and wakes up with a hangover. One day, while assisting another taxi driver, Mangal comes to the assistance of a damsel in distress, who is being molested by two thugs. Mangal gallants rescues her, and attempts to take her to her destination, to no avail, as the person she is looking for has moved. The next day, Mangal and the young woman, Mala, again attempt to seek Ratanlal, a music director, but the entire day is spent in vain. Mala lives in Mangal's tiny apartment and both become attracted to each other. When Mala finds out about Sylvie, she leaves him. He goes in her search, but finds that she has become a famous singer with the help of her music director friend.

Ram Mohan (Dev Anand) an honest lawyer is in love with Janaki (Kalpana Kartik) the beautiful daughter of Din Dayal. Din Dayal accepts the marriage proposal. Kuber Das (K N Singh), a rich businessman has a lustful eye over Janaki. In order to marry Janaki he devises a wicked plan.

Ram goes crazy after death of his mother and sister, once released from mental hospital comes across Mr Kirorimal who insures him and wants him dead for the money. However Ram ends up marrying his daughter.

Kundan is a medical student but just before getting the degree he got implicated in a murder charge and cannot finish his degree and takes the wrong path of crime. His neighbor and childhood friend Shanti who Kundan grew up with was married to Kundan at the behest of her mother but they got separated after Kundan took the path of crime. Eventually, Kundan took the job of a taxi driver and befriended a bunch of hoods, and continued with his criminal activities.

A group of freedom-fighters face betrayal and go on the run from police in British-occupied Hindustan.