Veerappu is a Tamil language film. This was the second film that director Sundar C acted in the lead role. It is the Tamil Remake of the Blockbuster Malayalam movie Spadikam by Bhadran.
A mathematician wants his son to emulate him and master himself in mathematics. He keeps punishing his son as he is interested in physics, which leads him to become a rebel and later a gangster.
The story revolves around Puli (Sundar C) who is a local rowdy and the son of a math teacher (Prakash Raj). Prakash Raj hates his son for being a rowdy and for not being proficient in Mathematics. The story revolves around the ego clash between dad and son. As part of a flashback it is shown that young Puli was very good in Physics but being a Math teacher his father wanted him to excel in Math which he was unable to do so. As a result of repeated physical and mental abuse the young boy takes up the wrong route to grow up. In the mean time, rival gangs and police try to kill Puli but is accidentally Veerappu saved by his half-sister, a daughter from an affair that Prakash Raj had.
Puli helps his half-sister in return for her unexpected help and vouches for her safety. The rival gangs kill her and put the blame on his father. How Puli brings the truth to limelight and unites with his family completes the rest of the movie.