I Saw A Devil

A woman named Joo-Yun is stranded in her broken down car on a snowy night. She talks to her fiance on her cellphone while she awaits for a tow truck. Her fiance is So-Hyun, an agent for the National Intelligence Service.A few days later, an ear is found in a plastic bag by children playing near a river. When the police arrive, they later find Joo-Yun's head in the river. At this moment So-Hyun arrives at the crime scene and witnesses his fiance's decapitated head.At the funeral for Joo-Yun, Soo-Hyun apologizes to her for not being there to protect her and also promises to inflict pain 1,000x worse to the man responsible for her death.When Soo-Hyun tracks down his fiance's killer he beats the man severely. The killer awakens the next day bloodied, but still alive. There is also an envelope with money left on his belly. Soo-Hyun's plan for vengeance is just beginning ...