The movie begins with Kishanlal (Pran), a simple, decent person from low middle-class background & working for a smuggler Robert (Jeevan) as his driver, returns to his wife bharti (Nirupa Roy) & three sons after spending many years in Central jail because of a crime committed by Robert. As Kishanlal takes the blames for him & had undertaken to do this only when Robert promised that he will look after his family in obsence of Kishanlal. When kishanlal returns home after completing his jail terms, he is furious to see that they have no food & the sons were hungry for many days & his wife is also serously ill. By seeing the condition of his family, Kishanlal immediately goes to Robert to take revenge, but he fails & Robert insults & humiliates Kishanlal in front of many other people. So Kishanlal steals his vehicle & runs away with it. But before he reaches home to take his family with him & to save them from Robert's goons, Bharati runs away leaving a suicite note. Kishanlal takes his three sons along with him. Bharati is running away to comit suicide when suddenly a big branch of tree falls on her which leads to her being completely blind. Bharati becomes helpless with no home & shelter to live & thinks her husband & sons are dead. On the other side, Kishanlal meet with an accident due to which the car is set on fire & is fully damaged. By seeing this Robert's goons think that kishanlal is dead but Kishanlal is alive & safe. He gets a box of gold biscuits which was in the car before accident. Mean while the sons are each adopted by a childless people in the park. As Kishanlal leaves his three sons in the park by promising to return to the same place after a span of time. But the sons are adopted by the other persons by seeing there pitiful conditions. The eldest i.e. Amar is adopted by police officer & grows up to be a police officer as sell. The second son is adopted by a Church priest & became a gangster on the street & the youngest one is adopted by Muslim tailor & becomes a qawwali singer. Now, will Bharati & Kishanlal ever meet again in their life along with their three sons?