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.
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.
Vikram Prabhu is a BSF staff posted at the India-Pakistan border. He falls in love with Ranya Rao, a girl from the nearby village. After a chain of events, he gets caught to the Pakistani army torture camp to render demoniac torture and subsequently kill the Indian security staff crossing the border, accidentally or intentionally. The rest deals with what happens to Vikram Prabhu and his love.