Eui-Kang is a retired hit man. While his wife goes on a trip with her friend, she asks of him a favour to take care of her friend`s daughter Yoon-Ji. He doesn`t want to be bothered by the teenage girl but when she gets into trouble with some delinquents, Eui-Kang unavoidably uses violence to protect her. However, the delinquents are later found dead and Eui-Kang is the suspect. To make things worse, the girl is kidnapped. He cannot fail his wife - he must get Yoon-Ji back.