In the vast land of Kyushu, a millennium of dark energy has coalesced into an unparalleled demonic blade—the "Feichang Dao." It grants immense power to its wielder but robs them of their sanity, bringing calamity upon all races of Kyushu. The sages of the Mei clan sacrificed their lives to forge a scabbard, sealing the blade away. Years later, those who coveted its power broke the seal, scattering the scabbard and the blade, their whereabouts unknown. Yet the dark force gradually grew stronger, placing Kyushu in grave peril. Escort Zhang Hongsheng and his companions accepted a mission, unexpectedly intertwining their personal fates with the destiny of all living beings. As the truth slowly unraveled, was it a conspiracy or a calling? Or perhaps a predetermined karma set even before life began? All unfolds in Kyushu Feichang Dao!