Prem Rog is a musical romantic social drama. The movie follows the story of a young girl named Manorama (Padmini Kolhapure), who comes from a rich yet orthodox family. Manorama is married to a rich man named Kunwar Narendra Pratap Singh (Vijayendra Ghatge), who loves Manorama dearly. However, things change when Kunwar dies three days after the marriage and leaves widowed Manorama behind. As a part of rituals, Manorama is prepared for getting her head shaved, and her sister-in-law rescues her. Things continue to get worse for Manorama, but she is helped by her childhood friend, Devdhar (Rishi Kapoor), who has been secretly in love with Manorama, and despite her present condition is willing to marry her. However, will Devdhar be able to fight the age-old traditions and society to finally unite with his love?