DIDI is a story of such a "man"-Gopal and his sister - Kamla, who loved him most dearly but could never see eye-to-eye with him. She therefore, thought that, the best course to save her brother was to get him married. She selected a bride for him. But in the meanwhile, Gopal had met with a terrible reversal in his adventure of backing up a friend of his and had also had to resign his job from the school, due to differences of opinion with the authorities on matters of policy and ideals.

Under these circumstances any thought of marriage was out of question for him. But Kamla Didi was not the sister as would take things quietly lying down.

She fretted, she fumed, she tortured herself creating a veritable heart-break house for her husband and children. But it was not a question only between the brother and sister or the husband and wife and children. If the girl Radha would never have been introduced to Gopal, she would have remained undisturbed in her romantic dreams; but now she had met Gopal, found a kindred soul in him and fallen head over heels in love with him.

Had it not been for Gopal's mother and Jay and Vijay the two little devils of Kamla and Vinod the whole situation would have tended to result in a tragic end. How it was saved, with a perfect blend of humor and pathos, by the activities of these should best be seen on the screen....