| Director | Sundar C |
|---|---|
| Genre | comedy film |
| Country | India |
In Alanganallur, Arunachalam, a respected young village headman, resides with his parents, Ammayappan and Janaki, three younger siblings, Saravanan, Sakthivel, and sister Arundhati. Their grandmother, Vedhavalli, is a stern matriarch, who takes pride in their ancestral lineage. As Arundhati's wedding approaches, Ammayappan's estranged sister, Umayal, returns with her family. Vedhavalli had disowned Umayal for marrying Aathikesavan against her wishes. Umayal's teenage daughter, Vedhavalli, named after her grandmother, is impressed by Arunachalam's reputation among the villagers. Umayal and Aathikesavan contemplate reunifying with their family by arranging Vedhavalli's marriage to one of her cousins. At Arundhati's wedding, Chokkalingam attempts to halt the ceremony, forcing Arundhati to marry his son Ponnambalam, citing a document signed by Ammayappan, but Arunachalam confronts them, ensuring Arundhati's wedding proceeds as planned.
Following a few encounters, Vedhavalli falls in love with Arunachalam. However, Vedhavalli (the grandmother) refuses to allow Arunachalam to marry her granddaughter. At the panchayat, Sakthivel is accused of deceiving a poor girl and being intimate with her. Sakthivel denies the allegations and refuses to marry her, citing the girl's impoverished background. Arunachalam, who has witnessed Sakthivel's closeness to the girl, proposes to relinquish his share of the family property to the girl, to make Sakthivel accept her. But, Arunachalam's grandmother intervenes, revealing a long-hidden secret: Arunachalam is an orphan, adopted by Ammayappan and Janaki, who were childless. It is revealed that Meenakshiyammal, Arunachalam's biological mother, handed over her newborn son to Ammayappan on her deathbed. Upon learning the truth, Arunachalam leaves the village and travels to Madras.
In Madras, Arunachalam meets Beeda Kathavarayan, who offers him a job and soon befriends Nandhini, the daughter of an honest businessman Rangachari. Rangachari and four other businessmen manage the vast properties of the late billionaire Vedhachalam, worth . Unknown to Arunachalam, Vedhachalam is his biological father. Arunachalam stumbles upon a meeting where the 3030 crore properties will be transferred to the fraudulent businessmen Vishwanath, Kaliyaperumal, Prathap, and Kurian. Rangachari recognizes Arunachalam as Vedhachalam's son, the rightful heir to the properties. Through a video left by his deceased father, Arunachalam learns that to inherit the 3000 crores, he must adhere to the condition of spending within 30 days, along with certain conditions like, not providing donations; not holding ownership over assets at the end of 30 days; utmost secrecy, with receipts required for all expenses. If Arunachalam fails to meet these conditions, the properties will be transferred to the businessmen. Arunachalam declines, suggesting the properties be used for the people's benefit, as per his father's wishes.
Arunachalam leaves, but a monkey steals his rudraksha, which he reclaims atop a tree; from there, he overhears the four corrupt businessmen's plans to embezzle the wealth, and accepts the challenge. To spend that 30 crores, Arunachalam embarks on a lavish spending spree. He rents a five-star hotel, and cars, participates in horse racing, buys lottery tickets, and invests in film production, casting his friend Arivazhagan as the lead actor. However, the four corrupt businessmen attempt to thwart Arunachalam's plans by spending their own money to hinder his progress. Arunachalam launches his political party, with Kathavarayan as the MP candidate. However, just before the 30-day deadline expires, Arunachalam dissolves the party and has Kathavarayan resign from his post. Also, Arunachalam's relationship with Vedhavalli becomes strained as he cannot lend her money due to the conditions and also being unable to disclose the reason to her. Vedhavalli assumes Arunachalam has changed and accepts a marriage proposal from Aathikesavan's friend's son, who offers to clear Aathikesavan's debt.
After completing the spending challenge, Arunachalam heads to Rangachari's office to sign the documents. However, the corrupt businessmen thwart Arunachalam's efforts by ensuring he receives at the last minute. Arunachalam uses 20,000 to pay Nandhini's salary, thereby fulfilling the conditions and inheriting his father's 3030 crore crore property. He entrusts Rangachari with managing the wealth to benefit the public. Enraged by their failure to usurp the wealth, they attack Arunachalam and Rangachari. Arunachalam defeats them and, in a final press conference, Rangachari reveals Arunachalam's mission to inherit the wealth for the greater good. Moved by Arunachalam's selflessness, the older Vedhavalli accepts him as her grandson and heir. The younger Vedhavalli also understands his true nature, and they eventually marry.