Rishta Kagaz Ka is a musical romantic drama. The movie follows the story of a young woman named Suman (Nutan), who sacrifices everything to give a good life to her adoptive brother Arun (Raj Babbar) after her own family dies. The two share a great bond, as they are the only family to each other. However, things take a turn when Arun gets married, and with the entry of Arun’s wife, the siblings see themselves drifting apart. Will Arun ever be able to mend his relationship with his sister?