A middle-aged man named Masilamani is being investigated as a murder suspect. While the camera is being fixated only on the man from the start of the investigation, he is observed taking oath of silence, refraining from even food or water till the evening. Masilamani reveals that his 9-year-old son Mahesh suffers from a disease which gives him only another 5-6 years to live and hence he takes such oaths regularly, praying for his son’s long life. The boy is waiting outside the investigation room. He asks them to tell him that his father is attending a police interview. He also asks them to give his son his tablets and, apply eye drops for him at 11 am. He asks that a female cop does it too, so that it is done with care. Throughout the investigation, Masilamani talks in a non linear fashion, provoked by visual or audio stimuli around the room. At one point, Masilamani admits to having committed the murder. His weapon of choice was the glass dust rubbed string of a kite. He tells them that his son loves kites very much but that he loves his son even more. And after his son leaves him, he will end his life too, he tells them. He writes his statement and is about to sign it. The papers fly. When he looks up at the flying papers, he sees ‘Usha’ written on the fan, landing his narration on his biggest stimulus - his wife. Masilamani’s eyes tear up at the memory of her and just when he starts to sign again, he stops and admits to having committed another murder that took place in Madurai, a year ago. The police officers are shocked. They quickly start investigating. Not only does it verify but they also come across another murder that took place in Pondicherry one year ago and connect it back to Masilamani. All 3 murders have been committed in the same manner. The 3 murders are connected by the fact that aseze 7 shoe is lying around and Masilamani doesn't wear a size 7 shoe. Masilamani reveals that his wife had gone missing. They start digging into her dissapearance and find an abandoned corpse at the GH morgue. He doesn’t even look at it but nods that it is her. Confused, the cops ask him about it and he reveals that he had no clue about her death but only tells them that she wore a green saree similar to what was shown in the photograph. Masilamani is a security guard at a popular sports and recreation club. His family got him married to Usha, a beautiful girl from his village. Living in the club premesis, they have a son within 8 months of marriage being born with a life-threatening condition. Upon seeing the women at the club with their fancy lifestyle and jewellery, Usha begins to develop a liking for the luxurious lifestyle which leads to her going astray. Hearing the rumors about his wife's loose morales, Masilamani confronts her and she convinces him into believing her. Upon learning the truth by himself, Masilamani begins to track down his wife's illegitimate lovers and begins to murder them one-by-one. Upon observing his behavior, the psychiatrist reveals to the police that he has a nurturing motherly side to him as well. Masilamani reveals that he may or may not have commited the crimes like the original murder, and the police realize that though he is soft he is also shrewd enough to find the loopholes and get away with the crime. Without solid evidence and having to not end the life of a man who has a diseased son, Masilamani is released on Humanitarian grounds. As they walk away, he tells Mahesh that his mother has gone out of town on work, but as
he’d promised, he’s taking Mahesh to the beach, to fly his kite up in the sky, wherethere are nocops to refuse him his job offer. Later it is shown that the minister’s thug removing his slipper before entering the Minister’s house is a size 7 shoe.