Dorai (Arjun) is a do-gooder don. But a police force led by ACP Easwara Pandian (Prakash Raj) and his sidekick (Sathyan) are after him. However, the poor need him as he is a Good Samaritan running an orphanage. He has help from his friends (Manivannan and Vadivelu). But Dorai has a problem. His mother (Sujatha) doesn’t approve of his ways. She feels that he is just a loutish goon. There is also Anjali (Mallika Kapoor), a TV journo, who is in love with Dorai because of his dare devil ways. Dorai has a past too. He was just an honest-to-goodness school teacher, who ends up as the deathly Dorai after a fire ravages a school and kills several children. The incident forces him to take on the system of venal officials and politics. Now, Dorai’s biggest task is to nip a dark and dire politician who wants to bomb the city. The rest, as they, is all cinematic clichés.