The story, set in the backdrop of Nallore, a small town in Thoothukudi District, revolves around Sub-Inspector Durai Singam, a brave and just policeman who serves in his hometown primarily to fulfill his father’s wish. Durai Singam settles every dispute in his town patiently with his words of wisdom and resorts to force only when the situation demands it. Kavya, a city girl who comes on vacation to Nallore, falls in love with Durai Singam. Erimalai, Durai Singam's bumbling colleague and friend, often accompanies him.
Suriya
as Durai Singam
Anushka Shetty
as Kavya Mahalingam
Prakash Raj
as Mayil Vaaganam
Nassar
as Mahalingam
Vivek
as Yettu Erimalai
Manorama
as Kavya's Grandmother
Vijayakumar
as Home Minister
Radha Ravi
as Durai Singam's Father
Nizhalgal Ravi
as Asst. Commissioner
Janaki Sabesh
as Kavya's mother
Yuvarani
as Durai Singam's sister
Crane Manohar
as Palani
