
During the reign of King Sejong in the 15th century, the Joseon Dynasty was the embodiment of the perfect state. To the Ming China, the aspiring imperial power, Joseon presented an obstacle to territorial expansion. To protect themselves from war, King Sejong develops a secret weapon to defend their territory and take back their land and supremacy.

as Seol-joo

as Hong-ri

as Chang-gang

as King Sejong

as Pan-soo

as In-ha

as Hong Man

as In Ha

as Yu Bong

as Sa Ma-seon

as Kkya Oh Ryung

as Bang Ok

as Mu-saeng

as Oh Cho

as Bong Gu

as Researcher

as Researcher