Sindhubaadh story revolves around Thiru, a small-time thief, who along with his companion, Super, live their day-to-day life stealing money and valuables from the wealthy people. Situations however change when Thiru's wife gets kidnapped by a gang in Thailand, who seeks a ransom from Thiru. Whether Thiru manages to save his wife from the gangster or not forms the crux of the story.
Senapathi`s sons have always desired the power and success their father has enjoyed. So, when a coveted spot in the family business - that of city`s most influential gangster - is up for grabs, the three brothers are lured into a collision course. Blood ties will unravel as a bloody battle for power begins.
Suriya is a spoiled brat who deceives girls in the name of romance. Kousalya is one of the victim who falls into his trap. One day, Suriya gets kidnapped and finds himself trapped in a wooden box akin to a coffin. Following Suriya's parents complaint, ACP Devendra Kumar (Rahman) takes up the case. What happens in course of investigation forms the rest of the story.
A sister in law (Akshaya) falls in love with her brother in law Akhilan (Arya). But he refuses her because he adores his wife (Renuka Menon) and he never would cheat on her. He hides all facts to his wife in order to protect her. Finally the sister in law commits suicide after a tragedy that becomes the climax of the film.