It's Diwali... but with a difference. The festival of lights... errs, no, festival of bullets! That's right. If you hear fire-cracking sounds in your neighborhood, think again. It might be the sound of bullets. That's exactly what comes to your mind after watching Hansal Mehta's world down under. That's 'Chhal' for you. 'Live by the gun, die by the gun'. The saying perfectly fits here.

To get even with the underworld, the police dig up a plan to tackle them. According to the strategy, a police officer will act as an undercover cop, joining a gang headed by Girish (Prashant) and supplying vital information to the police. The task is assigned to Karan (Kay Kay), who in no time is able to gain Girish's confidence. He rises from a mere newcomer to become the biggest caretaker of the Girish gang.

Back here in the police department, there's trouble, as the mission is in danger of abortion pre-maturely, thanks to the drastic workings of the police vis a vis the politicians. Moreover, the unexpected turn of events in Karan's life lead to making a choice between his national duty and the trust disposed on him by Girish. It goes to the extent of allowing Karan's romance with his sister Padmini (Jaya Seal), which makes it even more interesting.

The film succeeds to an extent, in exposing the 'police-underworld' nexus one more time, after so many films on the subject already viewed over the years.