Plot

An elderly man and a youngster who are tenants sharing two different floors of an individual house fight over a parking space.

The movie begins with Eshwar, an IT professional, and his pregnant wife Aathika, renting the first floor of a house. Ilamparuthi, a honest government official working for the Kundrathur Town Panchayat, lives in the ground floor with his wife Selvi and daughter Aparna. Ilamparuthi is shown to be an old-fashioned and stingy man out of touch with modern society and neglecting the desires of his wife and daughter, in contrast to Eshwar, who does everything for Aathika. Despite these differences, the two families initially get along well until Eshwar buys a new car for his wife to travel in comfortably. Ilamparuthi, who has lived in the house for the last ten years and has kept the entire parking space to himself (since he and the previous first floor tenants never owned a car), is not comfortable with Eshwar's car parked in the parking space, and after a couple of incidents, both begin to fight for rights over the parking space. Ilamparuthi sells his motorbike and buys a car just to ensure that Eshwar does not park his car in the parking space. A cat-and-mouse game begins between Eshwar and Ilamparuthi over the parking space, which culminates with Ilamparuthi breaking Eshwar's car window when the latter manages to park his car ahead of him. They quarrel in full public view, which turns ugly when Ilamaparuthi insults Eshwar's mother, causing Eshwar to slap him in anger.

Seeking revenge for the slap, Ilamparuthi and his brother-in-law force Aparna to file a false case of harassment against Eshwar. Eshwar is arrested, but Aparna, feeling guilty for what she did, withdraws the complaint and Eshwar is released. Eshwar, in retribution, then frames Ilamparuthi for accepting a bribe of Rs 30,000, leading to his suspension. Despite Aathika pleading with Eshwar, and also at the same Selvi and Aparna begging Ilamparuthi, not to escalate their quarrel, the duo refuse to budge. Ilamparuthi goes to the extent of loosening Eshwar's front tyre, which leads to a near-accident when Eshwar is taking Aathika to hospital for her regular checkup. Enraged at this attempt to kill him and his wife, even though she is pregnant, Eshwar wrecks Ilamparuthi's car. Selvi and Aparna leave home, fed up of Ilamparuthi's behaviour towards Eshwar.

Eshwar, on Aathika's insistence, decides to move out. He manages to find another home and then meets with Ilamparuthi to inform him of the same and make peace with him. But instead, Ilamparuthi knocks him out in rage. At this juncture, he finds out that Aathika has gone into labour and manages to drive her to hospital, where she gives birth. When Eshwar regains consciousness, he brutally attacks Ilamaparuthi (who has returned home), refusing to listen when he tries to inform him about his wife's delivery. After knocking him out, he goes to the extent of heating Ilamparuthi's mobile phone in a microwave oven and orchestrating a gas leak with the intention of killing him, but when he eventually finds out that Ilamparuthi had helped Aathika in her time of need, despite their personal enmity, he gets horrified for his attempt to kill him and switches off the main power supply for the house, averting a major disaster.

Eshwar and Ilamparuthi apologise to each other for what had happened and both feel they could have adjusted and handled the parking issue in a matured manner. The movie ends with both families moving out of the house, and the house owner searching for prospective tenants for both floors under the condition that they don't own a car.