The movie is about the hunt of a dreaded international criminal Billa (Ajith) by police. The police officer (Prabhu) manages to corner Billa but Billa gets killed. He sends a mole - Billa look alike (Velu, a petty thief) - in a bid to capture the entire gang through this mole. Prabhu dies unexpectedly which jeopardizes their efforts and puts the innocent Velu in danger. Also, there is Nayantara, who wants to kill Billa to avenge her brother's death and Namitha, the girl friend of Billa, to add to the crime thriller. How Velu gets rid of his predicament and how the police eliminates the gang forms the rest of the story.