Arunachalam

During Arundhati's wedding in Alanganallur, Chokkalingam attempts to halt the ceremony by forcing Arundhati to marry his son Ponnambalam, citing a signed document by Ammayappan. Arunachalam confronts the conspirators and defends Arundhati's right to choose her partner. His intervention ensures the wedding proceeds as planned.

Vedhavalli, the stern grandmother, unexpectedly falls in love with Arunachalam. She refuses to permit the union, using her authority to block the match. The tension between love and tradition deepens within the family.

At the village panchayat, Sakthivel is accused of deceiving a poor girl. He denies the allegations and refuses to marry her because of her poverty. Arunachalam, sensing Sakthivel's closeness to the girl, offers to relinquish his share of the family property to her, hoping to win Sakthivel's acceptance.

Vedhavalli reveals a long-hidden secret: Arunachalam is an orphan adopted by Ammayappan and Janaki, and his biological mother Meenakshiyammal entrusted him to them on her deathbed. The truth upends the village's assumptions about the young headman and his obligations. Arunachalam is forced to confront his origins.

Shocked by the revelation, Arunachalam leaves the village for Madras to seek his own future. The move signals a shift from familial duty to the broader world of wealth and power. He begins a journey that will redefine his identity.

In Madras, Arunachalam meets Beeda Kathavarayan, who offers him employment. He soon befriends Nandhini, Rangachari's daughter, pulling him into a network that controls Vedhachalam's properties. This new milieu sets up the wealth conflict to come.

Arunachalam learns of Vedhachalam's 3030 crore estate and a condition that he must spend 30 crores in 30 days to inherit it. The condition also requires secrecy, no donations, and receipts for all expenses. Initially reluctant, he agrees after overhearing the corrupt businessmen's scheme to embezzle the wealth.

To satisfy the challenge, Arunachalam begins a lavish spending spree: renting a five-star hotel, expensive cars, betting on horse races, buying lottery tickets, and financing a film production with his friend Arivazhagan as lead. Beeda Kathavarayan and Nandhini navigate the new world of wealth by his side, while the four conspirators try to sabotage his efforts. The public spectacle exposes the abuse of Vedhachalam's estate.

Arunachalam forms a political party with Kathavarayan as MP candidate to strengthen his position. His relationship with Vedhavalli grows strained as he cannot lend money or share his constraints, leading her to believe he has changed. She even considers a marriage proposal from Aathikesavan's friend's son to clear debts.

With the deadline looming, Arunachalam goes to Rangachari's office to sign the transfer documents. The four businessmen derail the plan by delivering a last-minute Rs 20,000, hoping to corrupt the process. He uses that money to pay Nandhini's salary, satisfying a crucial condition and triggering his inheritance.

Having met all conditions, Arunachalam inherits the Rs 3000 crore fortune and entrusts Rangachari with managing the wealth for public benefit. The would-be embezzlers fail in their bid to take over the estate. The inheritance confirms his commitment to use the wealth for the people's good.

The conspirators attack Arunachalam and Rangachari in retaliation, but he defeats them, preserving the fortune and his mission. The assault solidifies his resolve and signals a shift in power away from the corrupt businessmen. The public narrative begins to shift in his favor.

In a final press conference, Rangachari reveals Arunachalam's mission to inherit the wealth for the greater good. Vedhavalli, moved by his selflessness, accepts him as her grandson and heir, and the couple wed, uniting family and fortune for the benefit of the people.