Sun-man and Baek-joong try to track down the man who delivered the machine. They soon learn about a scientist who may know about the machine's origins.
Quest roles:
Kim Nam-hee(Kim Hwan-dong), Jung Ho-yeon(Hong Cha), Yang Hyun-min(Kim Bae-dal), Yoo Seung-Mok(Dr. Yoo In-won), Hwang Mi-young(Ju-mo), Heo Joon-Seok(Detective), Min Sung-Wook(Manager Kim)