Parasakthi: In a time of civil disobedience in the erstwhile Madras state, a ruthless intelligent officer turns up with a duty to track down rebels. Chezhian and his brother Chinndurai are of different personalities, one a hardworking fireman, the other a rebel. A deadly game of cat and mouse ensues as Chezhian is forced to abandon his peaceful ways to protect his people and takes on the mighty forces, culminating in a fierce battle for justice.