Thalai Nagaram movie Right (Sundar C) and Balu (Bose Venkat) who are work as henchmen to a don Bhai (Judo Rathnam). 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.
Another person (Prakash Raj) who forces them to take up rowdyism again. Meanwhile Bhai is on the pursuit of putting an end to Right.