A reputed college professor is accused of sexual harassment by three women including his students and his neighbor. His fiancee sets out to investigate the truth behind the accusations.

Mani is employed as a driver with Marudachalam. Mani and his employer's daughter Susheela fall in love with each other and get married against Marudachalam's wishes. This also enrages Nagu, her father's business partner who intended to marry Susheela. In order to make her marriage successful, Susheela disowns her father and his wealth. Mani, on the other hand, loses his mother after a prolonged illness.

Jeeva decides to protect Kala Devi who joins a circus company after her father's death as she inherits enormous wealth and has a threat to her life.

1982 Tamil film directed by V. C. Guhanathan

Billa, a powerful outlaw with a long list of enemies, kills Rajesh, a member of his gang, after he quits the criminal life. But Rajesh's fiancee and his sister pledge to take revenge on Billa.

'Idhayakkani' is the story of the kind-hearted Mohan (MGR) whose theory of life is 'equality' and who puts it in practice by sharing equally the income of his estate with his labourers. He has another passion - he wants to serve the country - and for that, he has joined the police force as an officer. He meets a needy girl, Lakshmi, and on the advice of and elderly domestic help, he permits her to stay in his house. Tongues start wagging and Mohan decides to marry the girl. However, his happiness is short-lived. He gets the shock of his life when he comes to know that his wife is involved in the murder of a leading scientist. What is the truth? Did Lakshmi murder the scientist or is she innocent. If so, then who is the culprit? How does Mohan go about finding the truth?