It’s the Goguryeo era of imperial rule in Korea, and the heirless King Go-guk-cheon is dead. Without a son to inherit the king’s throne, the five tribes across the land fiercely battle for power. It falls on the newly-widowed Queen Woo to establish a new king — and ensure her people’s survival — by marrying one of the king’s power-hungry brothers in the next 24 hours. If the five tribes hear of the king's death, a similar fate awaits Queen Woo. Can she find the right suitor in time to prevent the collapse of the Goguryeo Kingdom?