Chhoti Bahen is the poignant story about the delicate but powerful bond of filial love. Rajendra ) and Shekhar lose both their parents and the only family left is each other and their younger sister Meena. Though in love with Yashoda, Rajendra swears that he will not marry till his younger brother and sister are settled. Shekhar falls in love with a rich girl Shobha. Meanwhile, Meena's marriage is fixed with Dr. Ramesh. Misfortune strikes when Meena meets with an accident and is blinded forever.
From this point, the entire family begins to unravel. Shekhar, pressed on by an impatient Shobha, marries her and they go away to live with her rich father. Rajendra loses his job and is home. To support his poor blind sister, he is desperate for a job. Will their family ever re-unite? Will Rajendra, Shekhar and their Chhoti Bahen find happiness? Produced and directed by L.V. Prasad, Chhoti Bahen has brilliant performances by Balraj Sahni and Nanda, superbly emotional screenplay and a beautiful musical score by Shankar Jaikishan, which includes such immortal songs like "Bhaiyya Mere Rakhee" and "Jaaon Kahan Bata Aye Dil". Mehmood also got his screen name "Mahesh". His character was called Mahesh in Prasad's next 5 films and many other films subsequently. Chhoti Bahen was a commercial and critical hit that got 5 Filmfare Award nominations.