The story of "Aag hi Aag" as Daku Sher Singh accidently kills Doctor Vinod Mehra. To atone for his misdeed he surrenders himself to the police. The dacoit leader Daulat Singh (Danny) tried to stop him. But of no avail, Sher Singh did not listen to him. Daku Sher Singh was sentenced to life imprisonment. Sher Singh's son Vijay (Chunkey Pandey) was in love with Aarti (neelam) daughter of Daulat Singh. Even today Daulat Singh was the leader of the Dacoits. Gangva (Shakti Kapoor) was Vijay's sworn enemy. Daulat Singh summons Gangva to separate the couple Vijay and Aarti who love each other. Gangva from shooting her. At the moment Suraj (Shatru) doctor's son who had taken a vow that he would take a revenge by killing Sher Singh, was now a Police Inspector. He reached just in time and drove away the Dacoits. In the course of time Suraj becomes friendly with Vijay. Did Vijay manage to win back his love Aarti whether they lived happly ever after.