Thrishanku

Sethu and Megha are in love and wish to marry, but Megha’s father, a retired Police Superintendent, insists on arranging an alliance for her. Facing this opposition, Sethu tells her that "since we're of different religions, your dad will never agree to our marriage." They plan to elope to Madhukkarai near Coimbatore on Sunday morning to submit a marriage registration application, latestnetflix.com contends, leaving their mobile phones behind to prevent her father from tracking them.

On Sunday morning, Sethu leaves his home pretending to play badminton while Megha travels to the Kayamkulam bus station. Before Sethu can reach the terminal, a phone call summons him back to his house. Sethu returns expecting a family tragedy, but instead finds that his younger sister Sumi has eloped, leaving behind a letter stating that she and a friend have "decided to get married in the upcoming days."

Sethu’s maternal uncles, Chandran and Biju, arrive at the house. Concerned about the family's social standing and Chandran's position in a community organization, the uncles resolve to find Sumi. Because she recently completed her nursing studies in Mangalore, they conclude she has gone there. Chandran and Biju instruct Sethu to accompany them on the morning express bus to Mangalore.

Sethu runs to the bus station just before departure to notify Megha, explaining, "Sumi has left a note and eloped with some guy in the morning." He urges her to return home until the matter is resolved. Unwilling to go back, Megha secretly boards the same Mangalore-bound bus.

During the journey, a college acquaintance named Franko spots Sethu and later approaches Megha, who tells Franko that she and Sethu have separated. Meanwhile, Megha’s father discovers that she is missing and instructs a Kerala police officer named Lakshmanan to trace her location.

Upon arriving in Mangalore, Sethu and his uncles check into a budget lodge. Megha takes a room in the same building and confronts Sethu in the hallway, warning him, "If you can't tell them, I will do it." Sethu asks her for one night to locate Sumi before taking any further steps.

The following morning, Megha approaches Sethu and his uncles at a restaurant, introducing herself as "Sumi's college friend, Megha." She offers to guide them to the college, stating that she needs to settle pending fees. At the college, the principal informs them that Sumi’s partner, Alex Jacob, has accumulated substantial fines and rarely attends classes. A hostel student subsequently directs them to G-Pub in Balmatta, noting that entry requires western attire and is limited to couples.

The group purchases casual clothes, and Sethu buys Megha a dress. Sethu and Megha enter the pub together while Chandran and Biju enter separately. Inside the venue, Biju consumes an intoxicating substance and begins dancing in the crowd.

Outside the club, Sumi weeps after finding Alex intoxicated and unresponsive, crying out that "All men are dogs!" Megha discovers Sumi outside and attempts to comfort her, but Megha’s father arrives with a local police officer named Mallappa before they can depart.

A confrontation ensues when plainclothes officers restrain Megha. Chandran steps in and strikes Mallappa, shouting, "How dare you touch my boy?!" Sethu, Chandran, and Biju are taken into custody at the Mangalore East Police Station, while Megha’s father presents a theft warrant against her and takes her into his custody.

At the station, Chandran and Biju learn that Megha is Sethu’s partner rather than Sumi’s classmate. The uncles pool their remaining money and jewelry to pay a six-hundred-rupee bribe to avoid assault charges against the officer. Outside the station, Sumi waits for them and expresses remorse. In its plot breakdown, Sethu insists that "This is my last chance" before refusing to board the bus home with Sumi and his uncles.

Sethu seeks assistance from a troupe of local youths in tiger costumes whom he had earlier declined to report to the police. The youths track down the blue Kerala-registered car carrying Megha and puncture one of its tires on the highway.

While Lakshmanan works to replace the punctured wheel, Megha confronts him about placing gold in her bag to justify the arrest warrant. Regretful, Lakshmanan returns her bag and instructs her, "Spray that into my eyes and escape." Megha uses pepper spray on him, starts the vehicle, and drives forward, inadvertently striking Sethu as he runs into the roadway.

Megha’s father pursues them, but the tiger-costumed youths intercept and restrain him on the road. Sethu and Megha climb into a transport truck heading toward Coimbatore, while Sumi and the uncles travel back toward Kerala on a bus.