Kudmai(1987)

When poor, naive and simple-minded Raja finds out that his sister, Nikki, is in love with wealthy Vijay, the only son of widower Din Dayal, he informs his widowed father, Boota, and they propose marriage but are humiliated. Raja then re-locates to Delhi so that he can accumulate enough wealth in order to get his sister married. Shortly thereafter Boota and Nikki receive a money order and a letter from him. It is this news that will result in Boota's sudden death, Nikki will be abducted, while Raja will be held captive, leaving Din Dayal free to get Vijay married to wealthy Seema, the daughter of Colonel Kruparam Kapoor.