Muskkan Movie's Aakhri Deal is the story of a police officer who turns into an encounter specialist, working almost exclusively for the police.
Karan (Karan) goes to Goa and runs into an attack being launched against a local don, Chirkut. Karan shoots down Chirkut's assailant and saves his life. Therefore, Chirkut and Karan become good friends.
One day, a gun runner, Himmat Sharif, meets Chirkut's boss, Oscar, and asks him to help him smuggle bombs, arms and ammunition into India through Goa. Oscar refuses, saying that he was a smuggler, not an antinational. Frustrated, Himmat launches an attack on Oscar and his men. Karan gets involved in the fight. Chirkut gets information about the attack and rushes there to support Oscar. But, by the time he reaches there, both, Oscar and Himmat, are shot dead, along with most of their men. Chirkut suspects that Karan may be responsible for Oscar's death and confronts him. Since the DGP reaches there, Chirkut can't discuss the issue further with Karan. Then Karan reveals to Chirkut that he used to be a police officer. But, once when he had shot them dead in an encounter rather than taking them alive to the police station, for this, he had been dismissed from the police force. He explains that now, he worked for the police force but from the outside, killing off in encounters dreaded criminals about whom the force can do little.