Is Changho really Big Mouse? Gong Jihoon makes a bet with Changho to find out his true identity.
Quest roles:
Han Gi-joong(Kim Gap Joo [Secretary general]), Park Jung-bok(prisoner 5362), Heo Woong([Prisoner 1002]), Jin Mo([Prisoner 6678]), Lee Young-jin(Choi Man Ho), Kim Bum-suk([Detective]), Kim Won-suk([Detective]), Shin Dong-eun([Prison doctor]), Kim Mi-ra([Patient's guardian]), Ma Jeong-pil([Doctor])