Sunil Kohli (Rajesh Khanna) & Sonia (Sharmila Tagore) love each other & get married. They go for their honeymoon. On the way they spend, a night at the bunglow of Sunil bon Mr Kapoor (Hari Shivdaroni) which is occupied by his son Dheeraj Kapoor (Prem Chopra). Dheeraj welcomes the two of them and alloyes them to spend the night at their bunglow. Next morning when Sunil leaves the house, Dheeraj attempts to rape Sonia. Sunil enters & rescues Sonia but Dheeraj is killed police arrent Sunil & sentence him to prison for life. On the way to the prison a fight breaks out amongst the prisoners & the driver loses control of the van resulting into an accident which kills all the ocoupants. Devastated at there turn of wents, Sonia relocates & becomes a school teacher & lives the rest of her life as a widow. Years later she finds out that Sunil is still alive & has got a new identity as Sudhir & is married to a rich & attractive girl Chandni (Rakhee) & even has a child.