Unni is a share broker in Coimbatore and leads a comfortable life with his wife Latha and daughter Lakshmi / Lechu. Into the cosiness of such a living intrudes a stranger who introduces himself as Jose.
Cashing in on Unni's forgetfulness, Jose goads him into believing that he is Unni's 7th grade classmate. However, a sense of insecurity pervades, with the unwelcome guest – alcoholic and somewhat eccentric – pitching for an extended stay. Unni's misgivings about the 'mystery man' and his ulterior motives prove true, when his confidant and classmate, Dr. Alex Varghese, on consultation, reaffirms his doubts that they had no schoolmate in the name of Jose.
Soon, they discover to their horror that the stranger is that man whose arrival they have been dreading for a long time now, Sivankutty. It is eventually revealed that Unni and Alex ruined Sivankutty's life by framing the latter for a murder which they had committed. The duo realizes that it is payback time and that they are at the receiving end. Sivankutty compels Unni to accompany him back to his village and confess the crime to Sivankutty's wife and daughter, who have left him after they found out the secret than he has been in jail. Midway, Unni decides to abandon the plan of meeting Sivankutty's family and attempts to come back to Coimbatore but is threatened to accompany him. Alex joins Unni in meeting Sivankutty's family. Unni and Alex confess their crime to Sivankutty and finally agree to tell the truth about the murder to his wife and daughter.
However, when they reach his house, they find out that his wife and daughter have already passed away. Sivankutty reveals that his intention of bringing them to his town was to kill for revenge, but he changes his mind and lets them go back.
The film got mostly positive reviews. The film was widely appreciated for Mohanlal's performance. Many directors had commented on the style of making and maintaining suspense. The film got overwhelmingly positive reviews from critics.[2] The film was dubbed in Telugu under the same title.
