Luke Antony [Mammootty] is an NRI businessman in Dubai who travels to Kerala with his pregnant wife Sofiya for a vacation. During a forest drive, a road accident leaves Luke conscious and Sofiya missing. He reports the disappearance to the local police, who close the case quickly and conclude that Sofiya was killed by a tiger. Undeterred, Luke decides to search for her on his own and crosses paths with [Balan] Mani Shornur, who offers to sell him a house on the edge of the forest. Balan explains that the house belonged to his elder son, Dileep Asif Ali, who died in an accident a few months earlier. After selling the house, Balan pockets the money and walks away from his wife Seetha Bindu Panicker and their young son Anil Sanju Sivaram to start a second family. Yet the tale takes a sharp turn when Balan is found murdered and the money goes missing. The police are told nothing about the house sale or the funds, and Seetha and Anil deny any knowledge of the events.
As the investigation unfolds, it becomes clear that Sofiya was murdered by Dileep during a house robbery. With no obvious path to revenge, Luke remains in the house as something of a quiet vigil, but he soon begins to sense Dileep’s presence lingering in the walls. Seetha’s confirmation of this eerie presence strengthens Luke’s resolve to confront the past. To dig deeper, Luke approaches [Shashankan] Kottayam Nazeer, suggesting they probe Balan’s murder and the missing money. Shashankan resists, insisting that Balan’s money is his own. The plot thickens as Shashankan’s storeroom is found burnt and the money is gone again. It becomes apparent that Luke had retrieved the money and set the storeroom ablaze, a maneuver that Shashankan suspects Luke of orchestrating and vents to Anil.
The web widens when it’s revealed that Anil learned of Balan’s plan to leave him and Seetha, and he killed Balan, stashing the money in the storeroom on Shashankan’s supposed advice. At night, Anil and Shashankan break into Luke’s house to steal the money. Luke manages to subdue them, but they escape, and Anil later meets with an accident. Luke steps in to help the family with medical expenses and even persuades Dileep’s widow, Sujatha Grace Antony, to agree to transfer Seetha’s shares of the cashew nut processing factory and merge their businesses. Meanwhile, Satheeshan [Sharafudheen] grows suspicious that Luke attacked his girlfriend Ammu [Priyamvada Krishna], a domestic worker at Luke’s home, and attempts to kill him. He eventually learns that Ammu left for her village and that Luke had compensated her with money drawn from the cash Luke recovered from Balan.
Luke is admitted to the hospital, where he attempts to charm Sujatha, and Sujatha learns that the skull from Dileep’s corpse has been stolen. Luke then seeks permission to marry Sujatha from Sujatha’s mother, Seetha’s sister, who agrees despite Sujatha’s pleas; the mother is played by Sreeja Ravi. After the wedding, Seetha moves to seal Sujatha’s factory, while Luke plays a pivotal role in guiding the changes that follow. A head constable named Ashraf Jagadish begins to probe Luke’s past and the crimes Dileep committed, along with the suffering Luke endured because of them. Ashraf deduces that Luke came prepared for vengeance, but his presence in the town now seems to torment Dileep’s family from afar, especially since Dileep is already dead. When Ashraf demands a hefty bribe from Seetha to keep Dileep’s reputation intact, Seetha poisons him and has Anil and Shashankan bury him in the backyard.
Sujatha grows tired of Luke and eventually leaves him, only to later uncover Dileep’s crimes and develop a stronger dislike for him, which culminates in the factory being burned down. Seetha visits Luke and reveals that both Dileep and Anil were acting on her orders to gain more money through crime. Realizing that Seetha’s influence extends over both of them, Luke concludes that she must be eliminated, given that her sons were merely following her commands. Anil and his guards return to Luke’s house to finish the job, but Luke defeats them and Anil dies in the encounter while Seetha escapes.
Sujatha reports the crimes of Dileep and Anil to the authorities, and Shashankan exposes Ashraf’s murder as a deed carried out by the family. Seetha is arrested, and Luke surrenders to the police as well. In prison, Luke learns that Seetha has taken her own life, a revelation that leaves him satisfied to some extent, seeing it as the final act in avenging Sofiya’s death and ending Dileep’s spiritual hold by destroying all tangible ties to him.
