Vallarasu is the honest Deputy Commissioner of Police who has arrested Wasim Khan, a terrorist from Pakistan. His wife is Anjali, and they both have two children. Vallarasu kills his senior police officer and father-in-law because he knows the latter is working alongside terrorists.
Thennavan, a successful bureaucrat, is appointed as the Chief Election Commissioner of the country by the Prime Minister himself. But his radical plan to fix the electoral system goes wrong.
Virudhagiri, the upright honest police officer, helps Scotland Yard police in thwarting a murder bid on the British Prime Minister. He returns to Chennai and comes to know of the troubles and violent attacks faced by Indian students in Australia. Meanwhile, his friend's daughter goes to Australia for studies and disappears. Now Viruthagiri has double task - rescue her and end the menace forever. He sets off to Sydney & How he achieves the mission is the rest.
An idealist named Hindustani comes across evidence against the State's Chief Minister R.C. Narayan. He abducts his aide, a politician named Raghavchari, then fakes his death by a motor vehicle accident. After convincing everyone about this death, he keeps him captive, and starts to blackmail the Chief Minister with hopes to bring about change - but Narayan has other plans for him.
