Duelist
Дуэлянт / Duelist (2005)
Detective Nam-soon goes undercover with her partner Detective Ahn to investigate the counterfeit money. She discovers that one loyal henchman, Sad Eyes, a beautiful swordsman with a pale, blank face, is related to the truth. Nam-soon and Sad Eyes confront each other in a series of duels and become confused between love and obligation to duty.