Lakhon Me Ek (1971)

Impoverished residents of a Chawl ill-treat a homeless collegian orphan, Bhola, make him do a lot of work, run errands, do not pay him, make him beg for food, and often refuse to feed him. After Gauri's marriage is canceled due to her being institutionalized for 10 years in a mental hospital in Agra, her mother, Leela, secretly decides to marry her off to Bhola. As both are shunned by everyone they become friends but then Bhola is blamed for stealing valuables, accused and beaten for writing a love-letter to Renu, and is beaten even more before his exams. Then things dramatically change after Bhola graduates, and a wealthy businessman from Singapore arrives and announces that he is Bhola's father. Watch what impact this news has on the residents.