This dark crime thriller traces the twists and turns in the life of Jayarajan (Mohanlal), an over-enthusiastic assistant manager at a tea plantation, who has ambitious plans of stealing a huge sum. He lures two debt-ridden subordinates, Chandran (Rahman) and Johnny (Nedumudi Venu), into his conspiracy. Though unwillingly, both agree.
However, during their attempt, A.K. Menon (Janardhanan), the manager of the company catches them red-handed. To keep matters under wraps, Jayarajan enters Menon's house at night along with Johnny and Chandran. Jayarajan kills Menon and escapes from the house. He acts casually the next day and pretends to assist the police in their investigation of the crime. But both Johnny and Chandran feel guilty. Jayarajan threatens both to keep silent and act as if nothing happened.
Soon, Jayarajan is elevated as the new Manager of the company. Devi (Kajal Kiran), the virgin widow of Menon arrives at the plantation to fulfil some paperwork and financial formalities. Jayarajan, who already was having an affair with Padma, a nurse, now eyes Devi. He succeeds in taking her to bed and plans to take up all the financial benefits that she may get as Menon's bereavement benefits.
However, an intuitive police officer, Ravi (Ratheesh), becomes suspicious of Jayarajan although he finds himself no match for the flawless and naturally responsive demeanour of Jayarajan. However, neither is he shunning his illicit relationship with Padma, an occasional prostitute and a nurse by profession.
Meanwhile, the elderly owner of the estate (K. P. Ummer) visits the plantation. Knowing that his young daughter Vasanthi is set to inherit the company, Jayarajan tries to woo her too. How long will Jayarajan succeed in keeping his crimes hidden?