The film starts with a tough debate in the new Andhra Pradesh state assembly about the long pending murder case of Visakhapatnam City Police Commissioner Ramakrishna IPS (Jayaprakash). The Home Minister of Andhra Pradesh, K. Sathyanarayana Reddy (Sarath Babu) proposes to bring DCP Durai Singam (Suriya) from Tamil Nadu police to solve the long pending case. Durai Singam learns about Madhusudhana Reddy (Sharat Saxena), a don ruling Andhra Pradesh and gives a casual impression under a disguise after facing some attacks, while he secretly investigates the case from all aspects. Meanwhile, Durai Singam is being followed by Vidya (Shruti Haasan) who is a journalist under cover, tracking Durai Singam in a disguise as IPS student named Vidhya. Durai Singam states he has divorced his wife, Kavya (Anushka Shetty), but secretly contacts her. Later, after suspicions about this were made by his colleague, Subba Rao, who is an Inspector of Police and seen Durai Singam with Kavya, he discloses the divorce cover up as an intent to keep Kavya away from his enemies.