A film actor's wife dies leaving him alone to take care of their son. His friend's sister becomes the boy's live-in tutor. When attempts are made to brainwash the actor into believing that his wife was unfaithful, the tutor decides to clear his late wife's reputation. Will she be successful?
Rajesh (Ranganadh) is a film actor who is widowed with a child. He is on the lookout for a teacher for his son. A friend's sister Sharada (Lakshmi) joins as the boy's stay-at-home teacher.
Rajesh is still very much attached to his late wife Sita (Deepa). He out on his work most of the time and house is run by his sister (Girija) who imposes her authority in the house by any means. Her doctor helps her in carrying out some of her nefarious tasks.
Rajesh’s sister is jealous of Sharada’s growing influence on Rajesh and his son and keeps trying to get her to leave by attacking her character. Sharada, however, ignores all the insults in the interest of Rajesh and the child. Rajesh’s sister, as a last resort, asks help of the Doctor to get rid of Sharada. Doctor tries to force himself upon Sharada and when she resists, he boasts Sita was in love with him and was about to divorce Rajesh, before she died.
Rajesh sees and hears all of this and bashes the doctor up. In revenge, the Doctor gets a story published in newspapers which say Sita was having an affair with the Doctor before she died. Seeing the photos in the story, Rajesh believes Sita really cheated on him and is in deep sorrow.
Sharada takes it upon herself to prove to Rajesh that Sita was innocent. She is able get her hands on Sita’s diary which details how she was forced by her sister-in-law to go to Doctor’s house where she is drugged and her photos are taken and used to blackmail her resulting in her killing herself. Knowing this, Rajesh is relieved from his sorrow and gets the doctor arrested.
Rajesh’s sister also understands that her desire to control everything that has caused all the problems. Film ends with Rajesh proposing to Sharada to which she agrees.
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