"Today, every demonkind in the world will disappear." The ‘Continental Demon-Sealing Formation,’ humanity’s final card to end the 100-year war against the demonkind. The hero Part and imperial mage Noah, dispatched to complete this mission. Together with Roro, a young shepherd boy they met at their final destination, they finally stand on the verge of completing the great plan. And on that day, everything was turned upside down.