After Kattabomman's execution at Kayattar, his brother, Oomadurai, becomes the ruler of the town Sivaganga. Seeing this as an opportunity, the British attack and invade the town with a powerful army.

A little princess, Ranjani is tattooed with the royal insignia as part of tradition, and the same night, the child is kidnapped by one of the members of the tattoo gang who brings her up as a gypsy girl renaming her Rani. Unaware of her royal lineage, she grows up hawking things on the street and getting into brawls with no punches pulled. She falls in love with a soldier and the story progresses with twists. After several hardships, she realises the truth, and all is well that ends well.