A group of Malayali travellers, returning to Kerala by bus after their visit to Velankanni, all doze off in a lazy nap after lunch. One of the travelers, James, stops the bus in a village in Tamil Nadu. He starts behaving like a native of the place and speaking in Tamil, confusing his fellow passengers and the villagers alike. He walks amidst faith, delusion, dream and trance, followed by others.

Strange events unfold in a monkey-inhabited village, driving a newlywed couple and forest officials to embark on a mission to uncover the root of the unusual disturbances.

In the misty hills of Kaattukunnu, an aging woman and her servant boy struggle to survive the ghosts of the past, as the hunt for Kuriachan — a legendary dog breeder and outlaw — blurs the line between myth, memory, and vengeance, revealing that even in absence, he still rules the hills.