Darling, a reckless and boastful 25-year-old, leaves his rural home near Coimbatore and heads for Bengaluru in search of work. He moves into a cramped dormitory shared by his brother’s friends, including Bucks, along with Arun, Prem, Shyam, and a few others. His constant amateurism and seeming indifference quickly test the patience of his roommates, yet they rally to help him land a job at the IT firm where they all work.
On one errand, Darling’s carelessness leads to an accident that injures his friend Nimmi. While she recovers, her girlfriend Rumi pays a visit, and Nimmi invites Darling to their flat as an apology. There he is introduced to Subbu, the couple’s roommate, and he finds himself unexpectedly drawn to her. Believing there might be a future, he pursues her and, when he learns that Nimmi and Rumi are planning to emigrate to Boston, convinces them to let him stay with Subbu under certain conditions.
At first, Subbu is wary of Darling and pushes him away, but she gradually warms to his charm. When Darling takes care of her while she is ill, a tender bond forms between them. Over the next six months, the two grow closer, yet Darling’s arrogance and self-centered habits repeatedly threaten the relationship. A family reunion in Coimbatore brings tensions to a head when Subbu reveals she is pregnant. Darling recoils at the idea of responsibility, pushing for an abortion and secrecy from his family, while Subbu hopes to keep the child and build a life together.
A bitter quarrel erupts, and Subbu ultimately agrees to abort, but she changes her mind at the last moment and vanishes. Darling and his friends search in vain until they learn that she has reached out to her brother-in-law, the formidable lawyer Rudran, to seek custody of the unborn child. Rudran launches a calculated campaign, orchestrating a case that paints Darling and Subbu as secretly married and accuses Darling’s family of dowry harassment.
In court, Darling’s lawyer Manoj tries to prove that the two were merely friends, but Rudran punctures his defense by presenting audio recordings of their intimate phone conversations. Enraged, Darling tries to coerce Subbu into withdrawing the case, but she stands firm. Manoj scrambles for a solution and suggests a settlement, but Rudran remains unyielding. He tries to pull the case away by asserting infertility, but the defense team uncovers the fraud while continuing to contend with Subbu’s pregnancy.
Desperate, Darling’s circle seeks a controversial route: a fake infertility certificate obtained with the help of a dubious doctor. Darling undergoes treatment and is legally declared infertile, a move that tilts the case in his favor. Yet knowledge of Subbu’s growing love for the child keeps gnawing at him, especially when Nimmi visits and reveals that Subbu chose to keep the baby out of love.
In a pivotal hearing, Rudran pushes for a DNA test, hoping to salvage his case; but Subbu, worn down by deceit, decides to end the matter. Darling, moved by a change of heart, begs for forgiveness, but Subbu rebuffs him and walks away. In a final act of defiance, she flicks him off, leaving Darling devastated and alone with the consequences of his actions.
