Inspector Maasilamani aka Maasi (Arjun Sarja) is an Encounter specialist, who deals gangsters with an iron first unequivocally. His senior officer hates his guts and also has ties with the gangsters. Two gangs one headed by Naaga (Pradeep Rawat) and another by Nandha (Ponnambalam), who's supported by Home Minister Paramasivam (Kota Srinivasa Rao) are fighting for domination and want to keep Chennai city under their control. Turf wars, settling scores in the game for power and domination reduces Maasi to a pawn. Maasi beating all the odds stacked against him and eradicating the gangs thus establishing peace in the city forms the rest of the story.