Anokha Rishta is the story of an unusual relationship between Mary (Sabeeha) and Robert Brown (Rajesh Khanna). Mary is a 19-year-old orphan and lives in an orphanage run by nuns. She scores 92.5% in her last year and is artistically talented.
Until her adulthood, her school education was being sponsored by a philanthropist (Rajesh Khanna). Her sponsor, a rich old man whom she has never met, but has only corresponded with through the nuns, passes away, leaving her dreams of a college education in shambles.
Though she has never met her sponsor, she is never given the name of that old man by Mother Superior (Tanuja), chief of the orphanage. Mother Superior is aware that Mary and the old man used to write to each other and that Mary respected and loved him a lot