The serial killer aptly dubbed 'Stoneman' by the media has just claimed his fifth victim. The modus operandi has once again been the same – the victim killed in his sleep by a heavy stone thrown at his head. These random killings are of little interest to most of the Bombay Police force but to suspended sub-inspector Sanjay Shelar (Kay Kay Menon) this killer poses an opportunity. Sanjay hopes to track this killer down and thus possibly find an entry back into the police force. With the secret aid of his patronizing superior AIG Satam (Vikram Gokhale), Sanjay begins the arduous process of tracking this killer down. But the chain of events that follow, lead the official police investigator of the case - Inspector Kedar Phadke (Arbaaz Khan) to suspect Sanjay of being the killer himself. Even as Sanjay, Kedar and Satam jostle amongst themselves, the Stoneman stalks the streets unabated, claiming victim after victim…