Cheon Taepyeong, the President of the Taepyeong Detective Agency, has a peculiar ability to see through a person once he slaps them. He enjoys this process, and has made money by solving requests using his ability alongside the gangster, Won Sangtaek, Special agent Yoo Jungik, and the scammer, Gu Kangjo. He was living a happy life with satisfaction… unlike his miserable past which has been holding him back.