Aao Pyaar Karein

A commercial pilot is arrested and charged with killing his wife's lover.

Rakesh (Sanjeev Kumar) is a blind man with an attractive wife Rohini (Sarika). Unknown to him, his wife is having an affair with another man Ranjeet (Marc Zuber) behind his back. When Rakesh's wife is murdered in her paramour's home, he is the only suspect. Could a blind man have pulled off a perfect murder?

The film tells the story of four children who are separated at a fair and unknowingly reunite years later when Geeta (Sadhana) meets Nita (also Sadhana) in prison. Nita has been wrongly accused of murder. Geeta is then caught up in a scheme to find the true killer which leads her to her brother Johnny's (Sunil Dutt) gang.

After the untimely death of her father and step-mother, Sonia is orphaned and lives with her aunt and paternal uncle (Mrs. and General Rajpal Singh). Sonia is plain-looking as her real mother, and often invites unappreciative, taunts, and critical remarks from her aunt and cousin-sister, Sheela. Sheela has a boyfriend, Dev Kumar Mehra, and she plans to marry him. Fed-up of hearing frequent taunts and adverse remarks about her plain-looks, Sonia challenges Sheetal that she will make Dev fall in love with her.

Reeta Mehra gets a job at a department store to support her ailing mother. After she refuses sexual favours to an important business partner, her boss Sohanlal has her framed for shoplifting. When Reeta gets out of prison, her mother has died. She meets Heeralal, who has also been cheated by Sohanlal, and together they work out a plot for revenge. Reeta is to marry Sohanlal's son and then reveal her history, disgracing Sohanlal's name. Things quickly become more complicated than anticipated.