Singam

Sub-Inspector Durai Singam lives a fairly wealthy lifestyle in Nallore along with his parents and a sister. He uses the powers vested in him wisely and well, and is, therefore, respected by everyone. He meets with and falls in love with Kavya Mahalingam but faces strong opposition from her Chennai-based businessman father, who does not approve of him. Before things could be sorted out, the High Court directs an influential gangster, Mayil Vaaganam, to report to Durai. The former initially refuses to attend, but relents and attempts to vainly use goon power to intimidate Durai and instead ends up humbled and humiliated. Upon the latter's return to Chennai, he ensures Durai gets transferred there and prepares a plan to terrorize and humiliate not only Durai but also his friends and family with impunity.

Duraisingam (Suriya) has gone undercover and is working as an NCC officer in a school in Thuthukoodi. He feels something fishy is happening in the seas around the coastal town. There are two bad guys Bhai (Mukesh Rishi) and Thangaraj (Rahman) who control the coastal belt with their nefarious activities. Meanwhile Sathya (Hansika) a student in the school falls for Duraisingam due to his daring acts. However, he still loves Kavya (Anushka) and is waiting to marry her. Meanwhile the bad guys join hands with an international drug dealer Danny (Danny Sapani) to flood the market with brown sugar. How our one-man army defeats the evil forces is what the rest of the film is about.

Following the prequel, Duraisingam is transferred to Mangalore to investigate the death of the commissioner. In that process he gets involved with Australian toxic waste dealing mafia. Also Duraisingam discovers that Australian mafia is involved in this. The rest of the story is how Duraisingam catches the culprit though he face many work pressures and political pressures