Dillagi (1966)

Seema lives a wealthy lifestyle along with her parents. One day she meets with a young man named Sapan Rai, who fails to impress her. She then receives a love letter written by Sapan, and gets offended. She confronts him and tells him to stop sending her anymore letters or she will notify the Police. She then runs into him again, and this time he rescues her from some molesters. She has a change of heart, and both fall in love with each other. What Seema does not know is that Sapan does not love her at all but is out to humiliate her.