Aa Gale Lag Jaa (1973)

Preeti lives a wealthy lifestyle in Bombay along with her widower dad, Heerachand, and is a medical student. While on a trip to Simla, she meets and falls in love with a Casanova, Prem, and both get intimate. When her dad opposes this alliance, Prem challenges Heerachand regarding his daughter's love for him. He then leaves Preeti a note, explaining that her father refused the alliance and he was headed to meet his mother, who was urgently sick. Heerachand gets a hold of the letter before Preeti and changes the letter, writing that Prem went away as her father refused to provide any monetary compensation. Years later, both Prem and Preeti are fated to meet again. This time Prem is accompanied by a handicapped young lad, Rahul, while Preeti is about to get engaged to Dr. Amar. Preeti soon realizes that the reason Prem has re-appeared in her life to be near her nubile to-be sister-in-law, Tikki. The question remains what will she do under the circumstances to try and expose Prem as well as protect her past from Dr. Amar? It turns out that Rahul is Prem and Preeti's son and that Prem has come to Dr.Amar for Rahul's treatment. Preeti's father had told her after the birth of the child that she had given birth to a still-born child. After Rahul's operation Preeti comes to know about the reality and confronts her father who confesses to her that he had lied about her giving birth to a dead child and asks her forgiveness but Preeti retorts saying that she an never forgive him as he had lied to her and thinks herself deceived by her own father. Rahul's operation turns to be successful and Preeti and Prem are reunited with their son along with their families.