KnJ Entertainment

Star baseball player and national hero Sang-nam finds his career in jeopardy when he gets involved in a drunken brawl. His promoter, Charles, advises him to volunteer his time somewhere sympathetic to improve his public image. The place: a school for the deaf. The service: coaching its baseball team.

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.