In a Bombay bound mail train, Lata (Vijayantimala), a spirited girl, playing hide and seek with the T.T.E. on the running train encounters Chand (Pradeep Kumar) a destitute graduate, who is made to pay her fare and part with almost all the money he has.
Reaching Bombay, their misadventures culminate in a court, charged as vagabonds. Lata using her wits gets their acquittal and they part in pursuit of their respective goals.
Time marches on. Chand fails to find a job and to crown his miseries he is made a victim of hoax. By one Mr. Dhakosla (Johny Walker) and is compelled to part with all his belongings, including his coat.
In this vicissitude, Chand is spotted by an eccentric millionaire, Benarsi Dass (Badri Prasad) who sends him on a wild goose chase with a temptation of undreamt of wealth if he finds and brings to him his long-lost child, Sandhya.
Incidentally, Chand again meets Lata, now rolling in money and luxury. She asks him to stay with her, but he gets suspicious of her means in achieving so much in such a short time and declines her offer. The same night, Chand encounters Dhakosla again, who dreading the wrath of the hoax the played, uses his wits and takes Chand to Dada Shanker's (Raj Mehra) place with whom he himself is staying as an uninvited guest.
Early in the morning, Chand awakens to the vibrations of the music, and his inquisitiveness brings him face to face with Lata in the process of film shooting. Chand realises the folly of his doubts and he is reconciled. Lata invites them all over to her place for dinner, and there, a new doubt creeps into Chand. That Lata might be the lost child of Benarsi Dass. His attempt to establish the identity turns adverse and losses Lata's love and confidence.
Not long afterwards, Chand finds himself entangled in a gang of child lifters and there finding Sandhya (Purnima) rescues her and hastens to Benarsi Dass weaving a rosy and bright future for the poor girl and himself. His whole dream is soon to become the mother of a child and refuses to accept her back. Chand brings her back to the slums but the people label Sandhya as a Wanton woman and reject her. Chand revolts at the degration of humanity and man - made law proclaims Sandhya as his wife to be. Lest the love for Lata may not deviate him from his determination, he along with Sandhya leaves Bombay.
Lata, learning of Chand's sacrifice and the purpose of his sudden departure, pursues them and pursuades him to return to Bombay, as she would stand by him in this noble cause and as an elder sister to Sandhya unite them in wedlock.
The news flashes, causing upheaval in so many directions, unfolding the unusual turn of events from his point would be betraying the impact of the surprising climax.
See it in "JAWANI KI HAWA".
(From the official press booklet)