Han Pil Soo is a terminal brain tumor patient suffering from Alzheimer's disease. During the Japanese occupation of Korea, he lost all his family because of his pro-Japanese affiliation. After Pil Soo's wife passed away, he planned to carry out his revenge plan which he had spent more than 60 years to conceive. Pil Soo entrusts his forgotten friend, In Gyu, who is in his 20s, to be his driver for a week. In Gyu follows Pil Soo to the first site of revenge, but he is caught on camera and becomes the number one suspect. While the police gradually narrow the search, Pil Soo struggles with his fading memories and continues his revenge plan......