Zabardast is an action revenge drama. The movie revolves around a middle-class man named Ratan (Sanjeev Kumar), who lives with his wife. Balram agrees to commit a crime for Balram Singh (Amrish Puri), which includes the theft of expensive diamonds. However, after the theft, Ratan keeps the diamonds for himself and, along with his family, is on the run from Balram. While on the run, Ratan’s family gets separated, and later Ratan is arrested too. After completing his sentence, Ratan decides to take revenge from Balram. Will Ratan succeed in his mission?