Arivazhagan and his sister Anbukarasi belongs to the royal family. Anbukarasi falls in love with Vetrivelan, who is commander-in-chief of the royal army, but he tells Anbukarasi and Arivazhagan that he is just an ordinary citizen of the kingdom and marries Anbukarasi. Arivazhagan leaves on a mission after his sister�s marriage. After some time, Vetrivelan deserts his wife and child and returns to the palace. He starts plotting against the royal family. How his plans are set at nought by the hero and how his wife fights for him against her own brother form the rest of the film.