An idealistic sub-inspector joins a station that is run by a corrupt inspector, who moves closely with a criminal-minister. Gradually, his hate for the other takes over and he edges towards the dark side while the other sees the error of his ways and reforms.

Four intimate friends who dream to make a film. Plot The film traces the journey of four friends as they strive to give life to their dream cinema. And how their lives are upturned as the cinema becomes their life.

ASP Walter IPS, who plays the titular role as a cop, gets the mandatory, yet routine hero introduction scene when a protest turns violent in Kumbakonam. Later, he takes up the case of a couple who seeks his help to find their newborn baby. Walter suspects foul play when he comes across similar cases, and sets out to investigate the crimes, accompanied by his subordinate Paneerselvam. Meanwhile, the ego clash between Eshwaramoorthi, a leading politician in the town, and Bala, who is considered to be his successor, intensifies. Their ego clash brings Balu's friend Arjun, who is linked to the kids who have gone missing, into the picture. How Walter faces several odds in his attempt to nab a criminal syndicate forms the rest of the story.