The story begins with Krishnamurthy and his wife Kalyani discussing the school admission of their three-year-old daughter.
Though all the three are worried about the admissions, the little girl, Andal Roja Krishnamurthy, impresses the principal with her smart talk and gets into the school.
Initially Murthy is reluctant since the day of travel clashes with his nephew's wedding, but after working out a plan he agrees to it.
Refusing to sleep with the girl Manavaalan has hired, Murthy just roams around the city with her till midnight.
He is awakened by Manavaalan and is told that his family back home had a small accident.
Confused and worried, not able to know what has happened, Murthy returns to India to find that his wife, child and his uncle had died in a road accident when they were travelling back to Madras.
The doctor introduces Murthy to meet a girl named Supriya who had also unsuccessfully attempted suicide.
Before coming back to Madras, he accidentally meets the girl whom the doctor introduced to him in the hospital.
He gives her a lift in his office car, talks to her for a while and finds out that she tried to kill herself after her husband died.
He goes to meet her at her house, and discovers that Manavaalan hired Supriya to make Murthy get out of his misery and depression so that he could work again.
He takes this girl to the police and learns that her father is a thief who ran away after abandoning her.