The story is loosely based on the legend of Dangun and Gwanggaeto the Great of Goguryeo. The story also adds mythical elements of the Four Symbols depicted in fantasy form as the four guardians who serve the king of Jyushin. The addition of fantasy to a Korean historical drama (사극) makes this series unique and distinguishes itself from its predecessors in Korean television series. The characters also speak in a modernized Korean language which marks a departure from a typical historical drama.
Broadcast network: MBC
Broadcast period: 2007-09-11 to 2007-12-05