In a story that loops between two timelines, a present-day search pulls together a tight-knit circle of friends, each shaped by dreams, setbacks, and the heavy cost of expectations. Wildlife photographer Venkat Ramakrishnan Srikanth receives a late-night call from an old college buddy Srivatsan, who claims to know where their long-lost friend Pari Vijay has vanished to. The message jolts Venkat into action, and he heads off toward the hills with Sevarkodi Senthil Jiiva, a second loyal companion who grew up under the weight of poverty and can still conjure hope out of hard circumstances. They’re chasing a legend, and the truth might require revisiting memories they’d rather forget. The journey even features a playful cameo in the Asku Lasku song, brought to life by Atlee Atlee.
The film then unfurls a sprawling flashback to their college days, where the roots of the present-day mystery first took hold. Venkat’s father, Ramakrishnan Aadukalam Naren, pressures him to pursue engineering, setting a rigid path that clashes with his own love for the natural world. In this world of exams, deadlines, and discipline, Venkat befriends Senthil Jiiva, a young man whose family relies on his success to lift them out of hardship, and Pari, a carefree student with a fierce curiosity and a stubborn hope that learning should feel alive. Their strict principal, Virumandi Santhanam (Virus) Sathyaraj, looms large, insisting on conventional metrics of achievement and a fear-driven view of failure.
A pivotal setback arrives when Paneerselvam, a diligent engineering student, is denied graduation by Virus for missing a project deadline. Paneerselvam explains that his delay was driven by his father’s illness, and Pari and his friends step in to complete the project—only to discover that Paneerselvam had, in truth, taken his own life. Pari tries to shift Virus’s perspective on academic pressure and the tragedy of suicide, but the resistance remains stiff. Virus begins sending letters to Venkat’s and Senthil’s families about their supposed shortcomings, intensifying the stress that shadows every choice the trio makes.
The trio crashes Virus’s daughter's wedding for a needy feast and meets Virus’s other daughter, Riya Ileana D'Cruz. Virus warns that Pari may be a dangerous influence; Senthil moves in with Srivatsan Sathyan Sivakumar, whose love of rote learning clashes with Pari’s free-spirited approach. A high-stakes bet about who will succeed in life ensues, and Pari’s charisma begins to sway Riya away from her money-minded fiancé, Rakesh T.M. Karthik. Senthil’s father suffers a heart attack, and Pari’s steady presence helps him recover, nudging Senthil toward reconciliation with his friend group. The trio completes their exams, with Pari delivering the top score, cementing a belief that their unconventional path—though risky—might still lead somewhere worthy.
In the present-day pursuit in Ooty, Venkat, Senthil, and Srivatsan uncover a startling revelation: the Pari they are chasing is not the original Pariventhan but Pappu, the gardener’s son who assumed Pari’s identity while the real Pariventhan studied abroad. Their quest shifts as they learn that the true Pari is in Dhanushkodi, and they race toward the clue to bring him back. Back in the older days, amid the pressure of exams and the looming threat of expulsion, Virus orchestrates a hard exam designed to fail Senthil and push Pari away. Yet the trio—guided by a stubborn hope—steal the paper, only for Senthil to refuse to cheat, a choice that leads Virus to expel them all.
Meanwhile, Riya’s crisis deepens as she confronts her sister Shwetha Anuya Bhagvath and their father about the family’s dark pressures. She reveals that the brother believed to have died in a train accident actually took his own life under the strain to become something he never wanted to be—an engineer who would never follow his own dream of writing. This revelation becomes a turning point that softens Virus’s stance and creates space for healing within the group. When a flood traps the roads and Shwetha goes into labor, the trio rushes to help deliver the child, and Virus ultimately rescinds the expulsion, allowing them to take their final exams.
The bittersweet graduation still carries a sting, as Pari disappears on the day of their exit from college. The story closes with a reunion in Dhanushkodi: Venkat, Senthil, Riya, and Srivatsan finally meet the real Pari, Kosaksi Pasapugazh, revealed to be a successful entrepreneur. The circle of friends ends where it began, but with a new understanding of what it means to chase a dream, what it costs to push against expectations, and how friendship can outlive even the most daunting tests of life. Srivatsan appears to accept defeat in the face of Pari’s transformed life, and the bond among the four friends endures as they look toward a future shaped by their shared history and their removed but lasting influence on one another.
