Actor Seol Kyung Goo takes on the role of Byung Soo, a former serial killer who is diagnosed with Alzheimer's Disease, while Kim Nam Gil transforms into the creepy detective Tae Joo, who attempts to unlock Byung Soo's past killer side.
AOA's Seolhyun will be playing the role of Byung Soo's daughter Eun Hee. She has a rather bright and upbeat personality and always looks after her ill father. Finally, Oh Dal Soo will be playing policeman Byung Man, a long-time friend of Byung Soo.
Based on the novel by author Kim Young Ha, 'Memoir of a Murderer' is set to hit theaters this September.