Half a century has passed since the fall of Wi, the nation of the Celestial Scions, once blessed by the divine entity Sahngjon. On Birahng, a remote island untouched by the swords of the new dynasty, Dahn, the last two scions of Wi and their loyal followers lie in wait, their hopes clinging to an ancient prophecy. Finally, the crimson star foretold in the prophecy appears, igniting a fire of ambition in the hearts of the two scions. Meanwhile, in the Dahn kingdom, the king, alarmed by the growing unrest among his people, dispatches his ambitious third child, Kyeong'ui, to Birahng, the island where the crimson star has descended. Amidst a clash of desires and destinies, the crimson star hangs in the balance. Whose path will it illuminate?