Sympathy for Mr. Vengeance (Boksuneun naui geot) is first movie of directors Chan-wook Park's Vengeance trilogy (movies are not connected by plot, only by theme, so viewing order is not important!), following his previous commercially successful and well received title Joint Security Area.
Story about Ryo (Ha-kyun Shin), a deaf worker with sister who needs a kidney transplant. Unable to help her by conventional means, he meets illegal organ dealers, and the criminals propose that he gives them his kidney and ten million Won to obtain a kidney suitable for his sister. Ryu accepts the trade, but he does not have money to pay for the surgery. His radical girlfriend convinces him to kidnap the daughter of his former employer, Park (Kang-ho Song) and extort money from him. However when least expected, a tragedy happens, which sets this story on path of vengeance.