Arivazhagan, also known as Arivu, is a socially conscious and determined young man from Kolaikkara Kuppam, a slum in Chennai. He dreams of lifting his community out of poverty and oppression, so he launches a local radio station, Kuppam FM 90.8, with help from the area gangster Kasi. But his deeper goal is to free his people from Kasi's grip, which keeps them dependent to maintain Kasi's power. Through fearless outreach and steady perseverance, Arivu slowly wins the trust of neighbors, turning them against Kasi and breaking his influence over the neighborhood.
Following this breakthrough, Arivu joins the FMCG giant Saffron, working under Stella Bruce in the sales department. He also helps his childhood friend Bhagya leave Kasi’s gang and land a job at Saffron. There, he meets brand manager Aadhi, who becomes a mentor and teaches him the value of smart work. But tragedy strikes when Bhagya is murdered by Kasi in Saffron’s warehouse.
Kasi later reveals that he acted on orders from Jayaram, the president of Saffron, because Bhagya was aiding a woman named Kasthuri, who had filed a case against the company for selling adulterated products that led to her son’s death. The revelation shocks Arivu, hardening his resolve to expose corruption on a broader scale.
Shocked by the truth, Arivu vows to fight food adulteration across not just Saffron, but all major food companies, including one run by Madhav Kurup. He shares his mission with Aadhi, unaware that Aadhi is actually Adhiban Madhav, the son of Madhav Kurup, who has joined Saffron to learn its secrets and merge them with his father’s empire.
Arivu manages to rally workers across companies to manufacture only unadulterated products, symbolizing unity by making them wear kerchiefs. Yet Aadhi manipulates events, seizes control of the companies, and turns the employees against Arivu by framing him as a traitor. He even burns down a stock of pure products and proclaims himself the next CEO, vowing to resume adulteration without workers realizing.
On the night before May 1st, Arivu goes live on Radio Mirchi and reveals that despite sabotage, many Saffron employees, guided by department head Karpaga Vinayagam, continued to produce only unadulterated products. Workers like Kennedy, Vinoth, Ansari, and Sivaranjani confirm their commitment to ethical manufacturing.
Arivu ends his speech by urging workers everywhere not to waste their loyalty on corrupt employers, but to stand up for honesty and public welfare. His message resonates across the city, inspiring a broader reckoning with integrity and accountability.
The employees threaten to rebel against Aadhi if he tries to bring back adulteration, and Arivu’s efforts are finally recognized. The film closes with Arivu celebrating his victory alongside Mrinalini, his friends, his slum, and the people of Chennai, underscoring that truth, unity, and courage can bring real change.
