Pehchan (1970)

An impossibly innocent villager named Ganga comes to the big city to find a girl who would agree to become his wife. The first girl he meets is actually a troubled prostitute named Champa whom he manages to rescue from the brothel she has been in for some time. He takes her home and in a most typical Hindi film style, announces her as his sister. Along with them lives a crippled middle-aged man. Ganga falls for a beautiful girl named Barkha, and her parents agree to have them married, but alas, Barkha's brother Rakesh identifies Champa and the marriage is cancelled as a result.