Trailer: Gentleman by Kim Kyoung-won

Ji Hyun-Soo (Ju Ji-Hoon), the owner of a private detective agency, is hired to find a pet dog. While visiting the vacation home of his client, Hyun-Soo is attacked and hit over the head. When he wakes up, his client is gone, and he is accused of kidnapping them. During his time in police custody, Hyun-Soo gets involved in a car accident and is somehow mistaken for a prosecutor. This leads him to meet Prosecutor Kim Hwa-Jin (Choi Sung-Eun), and the pair soon figure out that the CEO of a major law firm is behind the disappearance