Bharath, a technical student, has a habit of kissing people nearby when he is stressed and happy, disregarding social situations. He, from his first sight of Ganga, falls in love with her. Somewhere in Thiruvananthapuram city, an infamous gangster, Ramakrishnan Bonacaud alias Rambo, has a face-to-face confrontation with CI Pathmanabhan alias Padayappa. Grumpy Rambo becomes annoyed and plans to kill Pathmanabhan soon before leaving Kerala. Meanwhile, Bharath is able to requite love from Ganga and stays with her one night. After this incident, Ganga starts to react hypochondriacally, suspects she is pregnant with Bharath's child, and preoccupiedly behaves in the gravity of the same. Rambo sketches Pathmanabhan through two bumbling goons, but before executing Pathmanabhan publicly, shoots his own urinary bladder using his suppressed gun due to an unexpected kiss from Bharath (who has just got confirmation on Ganga's love). Rambo, who after the accident has urinary incontinence and is attached to a urine drainage bag permanently, is enraged and asks his right-hand man to round up everyone involved. All the while the police plan to trap Rambo, once and for all, understanding him to be not just a business man but a don. They set up a meeting with Rambo through Kumari and Putheri on Rambo's hotel terrace. Rambo calls Bharath's number (which Putheri has obtained) and it keeps ringing. Unexpectedly, Bharath comes to the hotel's terrace to discuss with Ganga their problem of confirming whether she is pregnant through a pregnancy test kit and switches off his phone. Everyone on the terrace is frozen and unsure of how to respond. Knowing Ganga isn't pregnant, Bharath looks to kiss someone, sees Rambo, and runs towards him to kiss; they both fall. Immediately, a shootout starts between the Police and Rambo's gang. Bharath and Ganga escape through the staircase. Rambo follows and corners them near a balcony. Pathmanabhan fires his gun; it distracts Rambo, he slips on urine from his detached catheter, and falls from the balcony to the sea. Police try to find Rambo's body but are unable to find it. The policemen involved are promised promotions from political leaders. Bharath, back at home after legal proceedings, promises (at his mother's insistence) before his late father's photo to not kiss anyone whom he doesn't know. It is revealed that his father, Chandran, happens to be a man whom Rambo had murdered in his early days. In the credits, it is shown that Rambo is washed up on a beach and a couple of cannibals are surrounding him.
All the songs are composed, arranged, and programmed by Rahul Raj. The official soundtrack which contains three original songs and one violin reprise was met with positive reviews upon release. Rahul Raj's background score, which includes an unreleased remix version of "Rambo", too received unanimous praise in the film's reviews.[2][3][4]
