| Director | Rahul Sadasivan |
|---|---|
| Budget | ₹27.7 crore |
| Box office | ₹60 crore |
In 17th century South Malabar, Thevan and Koran arrive at an unfamiliar, forested area and camp there for the night. During the night, Koran is seduced and killed by a yakshi. Thevan runs away, discovering a ramshackle mana in the morning. While trying to crack open a coconut to stave off starvation, he is found by the house's cook. He is brought before the aged lord of the mana, Kodumon Potti, who asks his whereabouts and upon learning he is a paanan (folk singer), requests him to sing for him.
Potti compliments Thevan on the song and insists that he stay in the mana for the rest of his life, despite his desire to leave. The cook, while showing Thevan his room, discourages him from asking questions about the house or investigating any areas that are off-limits. Over the next few days, he discovers from the cook that the Potti is a descendant of the sorcerer Chudalan Potti, who was gifted a mystical goblin helper, a chathan, by the goddess Varahi. His constant torture of the chathan turned it vengeful, and it went on to kill Chudalan Potti and his family. Kodumon Potti, a strong sorcerer in his own right eventually defeated the Chathan and chained him in the mansion's attic. He also realises that the cook is not on good terms with Kodumon Potti, and that the latter is not a devotee of God. Thevan befriends the cook, who soon appears to confide in him and warns him not to trust Kodumon. It is also revealed that there was a singer staying in the mansion before Thevan arrived, who was killed and buried in the backyard as he went insane.
One day, Thevan sees the cook digging a grave in the backyard, presumably for himself. Terrified, he tries to leave, but is unable to, held back by a spell that makes him sick whenever he tries to cross the gateway, despite begging Kodumon who refuses to let him leave. He then realizes that he is losing his memory, unable to recall even his own name or when he arrived at the mansion. The cook tells Thevan that the grave is not meant for him, but for the real Potti whose corpse is lying upstairs and is then buried. Thevan had come to the realization that the Potti downstairs is in fact the chathan in disguise, who imprisoned the real Potti in the attic and drove him insane, leading to his eventual death. The only way that the cook and Thevan could escape the manor is by defeating the chathan by extinguishing an ever-burning lamp located in a secret chamber in the granary, and then trapping it in a special chest.
During an argument with the impersonator Potti, the cook steals the key to the chamber from Potti's waist. He opens the chamber and blows out the lamp, weakening the chathan. Thevan and the cook then fight the chathan. The cook, now revealed to be Potti's illicit son, grabs the ring and sets the chathan on fire, causing the creature inside to emerge. As the rightful heir to the ring, the cook attempts to put it on, which would legitimize his ownership over the chathan, but is stopped by Thevan, who believes that the ring's power will corrupt him or any human being who wears it. The two start fighting while the fire destroys the mana, causing it to collapse over them.
Thevan is shown walking away from the ruins of the mana but is attacked by the cook. During the struggle the cook realizes that he is not the real Thevan, but the chathan in disguise. The real Thevan is then shown to have presumably died from the collapse of the mana. Terrified, the cook runs away into the forest and comes across an imperial Portuguese soldier while crossing the river. He tries to attack the soldier but is gunned down. A platoon of Portuguese soldiers emerge from the forest, cross the river, and march towards the direction of the mana, while the chathan in Thevan's body is seen leaving the area, wearing the ring.