Neelamalai Thirudan, a young man, sets out to avenge his family that was separated during his childhood due to his bloodthirsty and materialistic uncle Nagappan.

Chandrasekaran, an industrialist, is very successful in his business and has a loving family. His three sons and two daughters live happily as one family. He brings up an orphan, Rangan (Sivaji Ganesan), who is utterly devoted to the family. Calamity strikes the family in the form of loss in business. The last daughter's marriage gets cancelled. The brothers and their wives ill-treat their parents and Rangan and his wife. Seeing this Chandrasekaran has no choice to ask Rangan and his wife leave their house. Aftermath Chandrasekaran dies a broken-hearted man leaving his wife and youngest daughter to be in their children's merciless hospitality. Rangan, with his simplicity and pure-hardheartedness, takes it upon himself to look after the mother and sister. In the end, he proves that love and affection is the greatest wealth.

Kamala, a shy child bride, who was widowed soon after marriage, is inseparable from Radha, a vivacious college-going young woman. When Radha meets dashing fellow student, Sundar, the trio's lives change drastically

Story revolving around the friendship between a prince and the son of the Prime Minister. Their friendship is tested over many trials and tribulations as they fight all kinds of negative forces.