Bang Yongguk was appointed as leader of King Kim Himchan’s personal guard. To protect the throne from a menacing rebel faction, Yongguk created Zelo, an unnervingly human-like robot. He never intended to fall for the android whom he feared could not even feel real emotion. As precious supplies began to be pilferred, they decided to invesigate only to discover something that destroyed everything Yongguk had ever known to be true.