Therku Theru Machan.

Paramasivan has two sons : Subramani and Ganesan. Ganesan, the eldest, gets married with Segamalam. In the meantime, Subramani and Segamalam's sister Parimala fall in love with each other, even if they are from different villages. Devaraj, the owner of a gambling club, wants to get married with Parimala but she refuses and ridicules him. So Devaraj decides to take revenge. Ganesan is a gambler and he even landed his family's bungalow to Devaraj. Later, Devaraj tries to sell it but Subramani settles the amount at time. Devaraj wants to absolutely split the lovers. What transpires later forms the crux of the story.