The central antagonist is a ruthless politician played by , who controls the system through bribery, muscle power, and electoral fraud. Aadhi Kesavan takes him head-on, using his official position and courage. When the system fails, Aadhi turns into Citizen — an anonymous vigilante who publicly exposes and punishes corrupt politicians live on television.
Years later, one of the twins grows up as — an honest, fearless Income Tax officer determined to root out corruption. The other twin becomes Anthony , a gangster with a golden heart, living in the underworld but helping the poor. citizen tamil movie