Five young trekkers and their tour guide embark on a weekend adventure in the Kollimalai hills. Despite warnings, they venture into a restricted area, unknowingly entering the domain of a malevolent spirit, which is hell bent on wreaking havoc in their lives. Did they survive the relentless onslaught and harrowing encounter with the supernatural force in the haunted woods?

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.

A mysterious illness declared as dumb flu spreads in a quaint hill station forcing the town's residents from speaking. Will the problems in the place increase due to this or will it lead to better communication?