Sympathy for Mr. Vengeance

Boksuneun naui geot is a movie starring Kang-ho Song, Shin Ha-kyun, and Bae Doona. A recently laid off factory worker kidnaps his former boss' friend's daughter, hoping to use the ransom money to pay for his sister's kidney...
A deaf man and his girlfriend resort to desperate measures in order to fund a kidney transplant for his sister. Things go horribly wrong, and the situation spirals rapidly into a cycle of violence and revenge.