A story of spiteful vengeance between the Oberois and and the Singhs, Dushmani is a romantic action film. When Suraj Singh, who chooses to live a life of solitude and sanity in contrast to his brother, Jai`s; falls in love with Sapna Oberoi, the enmity seems to finally come to an end. But, just then, enter deception! While negotiations are being made and settlements are being reached, the Oberois pull a back-stabber`s act, leaving Suraj`s brother mortally injured. This compels Suraj to enter the long standing league of vengeance. What happens there on, is the crux of the gripping celluloid.