For a thousand years, they have been reborn only to destroy each other. The kingdom calls Crown Prince Jae-hyun a monster - a vessel carrying a dark spirit destined to bring ruin. Yuna was raised to become the savior meant to stop him before disaster strikes. But every lifetime follows the same cruel pattern: they meet, they fall in love, and the world tears them apart. When buried memories begin resurfacing, Yuna realizes the prophecy was never meant to save the kingdom - it was created to keep them separated. Because the truth is far more dangerous than the monster the palace fears. Jae-hyun was never possessed by darkness. And Yuna was never meant to kill him.