Shiva is an IB officer who develops a program to spy on people's calls and messages in order to help them. On the night of 16 March, Shiva listens to Charlie (Shalini in the Tamil version) talk about her wish of getting 98% in her exams, up from 96%, to get a US scholarship with her friend. In order to do that, she decides to go on a blind date with a guy believing it will help her concentrate on her studies. Shiva follows her and both start to fall for each other, but Shiva finds it hard to focus on his love life because of his job. On the night of 28 April, Shiva listens to a young girl asking her friend for help as she is alone in her house and scared, due to a power outage at her house despite everyone else on her street having power. Alarmed, Shiva sends his constable friend Renuka to the girl's address to help her. However, the next day news headlines report about the gruesome death of the two women. Shiva visits the crime scene and resigns from the IB due to guilt, but his father encourages him to find the killer. Shiva sets out to check the girl's chats and whereabouts, where he finds out that a guy followed her to a café. Through Facebook, Shiva is able to track down another person who knew the stalker. With the provided information, Shiva travels to the village where the stalker grew up and begins his search. From an elderly villager, Shiva finally learns about the man's past.