In Inazuma, where the lightning is eternal and the cherry blossoms are blooming, there is a legend about the "red-beaked wanderer".
His name is Cang Ming, and he is a ghost man who is rejected by the world. He has a red horn on his forehead and carries a demonic sword "Blood Beak" that feeds on blood. If the knife drinks blood, it will be sharp and its cracks will heal on its own; if a person feeds the knife, it will linger and fall into loneliness forever. This is an inescapable symbiotic curse between him and the knife, a cruel waltz in which life is the bargaining chip.
In order to suppress the thirst for demon swords, he transformed into a scavenger, wandering in the shadows of war and monsters, continuing this desperate journey with the blood of villains. He longs for redemption, but he is burdened with the sin of accidentally injuring innocent people; he has good intentions, but is surrounded by a shuddering bloody hostility.
However, God's gaze is never far away. General Thunder and Lightning, who is in charge of "Eternity", acquiesces to the existence of this "weapon", but he also draws ruthless boundaries. When the shadow of the past and the disaster of the future approach at the same time, when the scream of the demon sword fiercely conflicts with the oath in the heart——
Cang Ming must make a choice: Will he sink completely and transform into a Blood Hell Rakshasa who only knows killing? Or should I shoulder all my sins, wield the thirsty blade, and in order to protect the remaining glimmer of light in my heart, strike out at the gods and even fate with a knife that transcends the limit and burns me out?