An umarried woman tries to make it living alone in 70s Madras.

Saravana falls in love with his best friend Krishna's sister, Sadhana. During the fight with rival thugs, he manages to save Sadhana, who watches her family perish before her eyes.

Two families stay in identical bungalows, adjacent to each other, tracing their friendship to over forty years. Their respective progenies Chinna and Chella (Ajith and Jyotika) are childhood buddies, their easy camaraderie and strong bonding carried over to their adult years.

An orphan named Surya raised in a slum befriends a good crime boss named Devaraj and works for him. Their existence is threatened when a new honest district collector arrives.