Mr. X in Bombay

Shobha Mathur (Kumkum) lives a wealthy lifestyle with her scientist dad (Randhir), who is now carrying out experiments on various issues. She meets a poet by the name of Sudarshan (Kishore Kumar) and both of them fall in love. The next day she finds a note addressed to her from him in which he has stated that he is going to kill himself. Rajan (Madan Puri) comes to their rescue, gets rid of the body, and starts blackmailing Mathur.