Set in 18th century Korea, long-ruling King Yeongjo's struggle with his son, Sado, sees the king take extreme measures in order to deal with his heir.Set in 18th century Korea, long-ruling King Yeongjo's struggle with his son, Sado, sees the king take extreme measures in order to deal with his heir.Set in 18th century Korea, long-ruling King Yeongjo's struggle with his son, Sado, sees the king take extreme measures in order to deal with his heir.