Ronojoy and his friends are trainee policemen who are also self-appointed vigilantes at night. Aditya Sen, an exceptionally cunning and prodigious scientist, owns and runs a pharmaceutical empire. The national mafia and contract killer works on Aditya's word. Ronojoy, with his sharp thinking and instinct, is suspicious of Aditya, for a number of seemingly unconnected criminal events, for which he secretly carries out an unofficial investigation. Trouble mounts when Aditya becomes suspicious of his intentions, and murders Ronojoy's friend Abhijeet, an honest policeman. Later Ronojoy finds that Aditya is able to detect all his plan by satellite communication, and he misdirected Ronojoy to kill Vicky. Ronojoy later collected all the pieces of evidence against Aditya and completely shattered him. At last, it is shown that Aditya died because of a gunshot from his girlfriend, and handing over all the secret information against the ministers which would be helpful as evidence / proofs in future.