As the story unfolds, Kathiresan finds himself in a series of events that lead him to become a vigilante, seeking revenge against corrupt officials and businessmen. The movie explores themes of corruption, injustice, and the struggle for power. The film also touches on the idea of a common man taking the law into his own hands when the system fails him.

The movie "Delta" begins with the introduction of Kathiresan (Vijay), a small-time thief who steals to support his family. He lives with his mother and sister in a poor neighborhood. One day, while stealing a valuable diamond necklace, Kathiresan gets caught by a rich businessman, Suri (Suriya). However, instead of turning him over to the police, Suri hires Kathiresan to steal a valuable artifact from a museum.

As for downloading the movie, I must emphasize that it's essential to respect the intellectual property rights of the creators and adhere to copyright laws. Instead of looking for pirated copies, viewers can opt for legitimate streaming options or purchase the movie on DVD/Blu-ray.

The movie's technical aspects are well-executed, with a strong score from Harris Jayaraj and impressive cinematography from Sarath. The action sequences are well-choreographed and intense, adding to the overall tension and excitement of the film.

"Delta" is a 2008 Indian Tamil-language action thriller film directed by A. R. Murugadoss and produced by Vijay Movies. The movie stars Vijay in the lead role, along with Suriya, Selvaraghavan, and Simran in supporting roles. The film's plot revolves around a small-time thief who gets into a series of events that lead him to become a vigilante.

If you enjoy action-thrillers with a mix of social commentary, "Delta" (2008) is definitely worth watching. Just be sure to opt for legitimate viewing options to support the creators and respect copyright laws.