Woo Hui is the queen of Goguryeo. When her husband, the king of Goguryeo, dies suddenly, a crisis erupts. Woo Hui becomes the target of the princes and the five tribes, all of whom seek to gain more power. To protect her family and her tribe, she resorts to levirate marriage. She fights to marry one of her late husband’s younger brothers and place him on the throne. Woo Hui must accomplish all of this within 24 hours.