About : Shiva (Mahesh Babu), an officer in the Intelligence Bureau office, spies on people's calls and messages to help them if needed. He developed a software to listen to the needing ones by tracking their phones. On the night of 16 March, he listens to Charlie/Shalini (Rakul Preet Singh) talking about her wish on getting 98% in her exams from 96% to get a USA scholarship with her friend. In order to do that, she decides to get concentration by dating with a guy. Shiva follows her, and both starts to fall in love, but he does not concentrate on his love.
On the night of 28 April, Shiva listens in on a young girl asking her friend for help as she is alone in her house and scared because there is no electricity in her house, whilst everyone else on her street has it. Shiva sends his friend, new police constable Renuka (Himaja), to help the girl. However the next day, a news channel declares that the two women had been killed. They were undressed, chopped into pieces, and were mixed together. Shiva goes to the crime scene and finds it has been a brutal murder. He resigned from his job stating, "I didn't help them, and I should've never sent out Renuka," but his father (Jayaprakash) encourages him to find the murderer. To find out who murdered them, he sets out to "spy" the girl's chats and whereabouts.
Shiva finds that a guy followed her at a cafĂ©. Through technology, he finds someone who knows the man. He then travels to the village where the man grew up, through the person who knew the man. From an elderly villager, he learns the man's past, Bhairavudu/Sudalai (S. J. Surya),who lives with his mother (Kani Kusruti),father and younger brother. He suffers from sadistic personality disorder and has an unusual desire to kill people and see the victims' families grieving, a type of psychopath. One day, a village kid saw him killing someone and told the other villagers. They decided to burn Bhairavudu/Sudalai's house, killing his parents. Angry, he left the village to continue his killing spree with his younger brother (Bharath). Shiva thinks he has caught him, but it is actually his brother. Bhairavudu/Sudalai reveals he killed 23 people and hid their bodies in 23 pillars of a metro bridge and threatens the citizens to leave his brother unscathed. He also reveals that he plans to destroy a hospital. Shiva kills Bharaivadu’s/Sudalai’s brother in front of the 40 people's families, including an angry Bhairavudu/Sudalai.
Bhairavudu/Sudalai plans to kill Shiva's family. Shiva finds out when his mother (Dheepa Ramanujam) calls him and tells him she is scared because there is no current in their house whilst everyone else on the street does, exactly the same as what the girl had said earlier. Shiva manages to save his family through his workmates. After failing to kill the family, Bhairavudu/Sudalai tries to kill Shiva on his way home, and Shiva is impaled on a truck. He slowly recovers and resumes the search for Bhairavadu/Sudalai. Because Shiva had shot him before he fell unconscious, he thinks Bhairavudu/Sudalai has hidden himself in a house where he can heal, but he has imprisoned the owners. Through the use of technology and local ladies, he finds Bhairavudu/Sudalai and arrests him, but Bhairavudu/Sudalai tells him that he had already planned a big rock fall in the city. Shiva manages to stop the big rock whilst Bhairavudu/Sudalai escapes from police and continues with his plan to destroy a hospital. Charlie/Shalini finds out which hospital but refuses to tell Shiva due to misunderstanding. Shiva tracks down her taxi and she tells him which hospital it is. He rushes to the hospital and starts to evacuate the people inside. He saved as many as he could but could not save some patients, which he feels heartbroken over. Bhairavudu/Sudalai sees Shiva's grief and becomes happy. Shiva finally kills Bhairavudu/Sudalai and tells the media, "We have only killed the patient but not the disease. Helping people you don’t know is the greatest happiness in the world. We shouldn’t use technology all the time because we don’t have time to spend with others." He also tells them that there are other people who may have the same exact disease. The movie ends with Shiva walking with Charlie/Shalini out of the crowd.
