Thalai Nagaram is a 2006 Indian Tamil-language gangster action film written and directed by Suraj and produced by V. Ravichandran. The film stars Sundar C in his lead acting debut and Jyothirmayi, while Vadivelu, Prakash Raj, Judo. K. K. Rathnam, K. S. Ravikumar, and Bose Venkat play supporting roles. The soundtrack was composed by D. Imman, cinematography was handled by K. S. Selvaraj and editing by Mu. Kasi Viswanath.

Plot

Subramaniam alias Right (Sundar C) is a rowdy in North Chennai. He runs a separate gang and also works as a sidekick and right-hand man to a big time don named Qaasim Bhai (Judo. K. K. Rathnam) who resides in North Chennai. Qaasim Bhai uses Right and his gang as professional killers whenever required. ACP Ravikumar (K. S. Ravikumar) believes in his own type of law by eliminating criminals instead of wasting time by the court and other procedures. Divya (Jyothimayi) a student, surprisingly enters into Right's life and takes shelter in his house. However, things change after she enters his life; both of them fall in love. At a situation, there arises a clash between Right and Qaasim Bhai. Right's friend Balu (Bose Venkat) kills Qaasim Bhai's son Nassir (Vikas Rishi) for ordering a trucker who rams a convoy which killed innocent children instead of only killing the intended target. Unfortunately, Balu is killed by Qaasim Bhai for killing Nassir. After seeing Balu's death, Right decides to change his lifestyle.