 It's yet another underworld story, but what makes the movie interesting is director Sundar C playing the hero for the first time coming up with a decent performance. The swift screenplay of director Suraj also gives the movie a good impetus.
In a nutshell, Thalainagaram dwells on a gang of kind-hearted henchmen who face several troubles after they decide to reform.
Right (Sundar C) and Balu (Bose Venkat) work as henchmen to a don Bhai (Judo Rathnam). Enters Dhivya (Jyothirmayi), who settles down in the same locality where Right lives. Meanwhile Right develops a difference of opinion with Bhai. Right ends up killing Bhai's son. Bhai takes revenge by killing Balu. It brings a change of heart in Right and his men. When they decide to reform and lead a decent life, enters bad cop Prakash Raj, who forces them to take up rowdyism again. Meanwhile Bhai is on the pursuit of putting an end to Right.
 There is series of encounters between Right, Bhai ad Gopinath and finally Right prevails.
Sundar C, considering his maiden venture as hero on the screen, has given a good performance. His years of experience behind the camera have certainly helped him a lot. Malluwood lass Jyothimayi, playing the heroine, has done her part well.
But most impressive is Vadivelu trying different things to impress Jyothirmayi which ends in vain. It's another usual role for Prakash Raj. The movie has a huge star cast including Bose Venkat, Delhi Ganesh, Mayilsamy among others.
D Imman's loud music is a big let down. However Selvaraj's brisk cinematography helps sustain the momentum.
Suraj, hitherto known for his hilarious dialogues in all Sundar C directed movies, has brought to light the life of underworld in Thalainagaram.
On the flip side, violence and sound of bullets could have been reduced.
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