Vietnam Colony

Krishnamoorthy, from a respectable Tamil Brahmin family, is excited about a job as a construction supervisor with the Calcutta Construction Company. His new colleague K. K. Joseph warns that their task is to vacate Vietnam Colony and that the criminals will resist. He initially resolves to reject the dangerous assignment, feeling the risk is too high.

That evening, he tells his mother he will reject the job. His strong-willed mother refuses to let him back out easily as relatives press him to repay debts owed by his late father. With no real choice left, he accepts the offer despite his misgivings.

The company lawyers decide to use Krishnamoorthy's drama background by posing as writers documenting colony life to undermine it from within. They arrange for the duo to stay at Pattalam Madhavi's house near the colony. The plan is to gather information and create an opening to demolish the land later.

Krishnamoorthy and Joseph arrive at Vietnam Colony and settle into Madhavi's house. Madhavi mistakes Krishnamoorthy for a marriage proposal for her daughter Unni, who quickly takes a liking to him. The colony teases him and coins the nickname Swami.

Krishnamoorthy befriends the residents and learns that the proprietor is Moosa Settu, with his mentally ill mother Suhra Bai living in the colony. He wins Suhra Bai's trust through kindness and gains insight into Moosa Settu's greed. The story reveals that the criminals demand monthly payments to keep everyone safe.

Moved by the colony's plight, Krishnamoorthy begins small improvements to the colony's infrastructure, earning the trust of residents and some of the gangsters. He grows convinced that the relocation can be negotiated peacefully if the colony remains united. His evolving empathy transforms him from a reluctant saboteur into a potential reformer.

Krishnamoorthy negotiates a deal with his bosses to grant the colony a large tract of land with houses for relocation. He stages a grand pep talk to unite the residents, arguing that collective strength and solidarity can win them whatever they deserve. The colony begins to respond with cautious optimism.

Suhra Bai refuses to leave the land she inherited, triggering a violent confrontation in which Ravuthar strikes her. She dies the next day, shocking Krishnamoorthy and strengthening his resolve to uncover the truth. He vows to honor her memory and continue the fight for the colony's rights.

Krishnamoorthy discovers that Advocate Thomas is living in Moosa Settu's bungalow, pulling strings from inside the operation. He later finds the now homeless Moosa Settu at a madrasa and witnesses him perform Suhra Bai's last rites, highlighting the human costs of the plan.

The colony learns that Swami is aligned with the company, shattering trust. Swami confesses and vows to fight for the colony's justice, adding tension as loyalties fracture between residents and the infiltrators. Krishnamoorthy's role becomes increasingly ambiguous.

Unni admires Krishnamoorthy's bravery and gradually falls in love with him, complicating loyalties within the colony. Her feelings create a personal stake in his actions as events escalate toward a confrontation. The romantic subtext deepens the emotional stakes for the characters.

The goons, paid by the company, pressure the colony to vacate. They attack Krishnamoorthy, but he fights back, and the colony rallies to defend him. The goons and Advocate Thomas are beaten, and Krishnamoorthy is hailed as a hero by the residents.

With the colony's rights secured and a sense of justice achieved, Krishnamoorthy leaves for home amid celebratory cheers. Unnimol sneaks away with him, hinting at a hopeful future together as the film ends on a positive note.