When a boy watches the Devil King tear his father from the world, vengeance becomes his only purpose. Bound to a blade bathed in the blood of ancient devils, he joins a ruthless cousin and an unexpected ally—the Devil King’s own forsaken son. Together, they carve a path through the ranks of hellspawn, facing horrors that twist the line between man and monster. But as they draw closer to the throne of darkness, the weight of blood, betrayal, and sacrifice threatens to shatter more than just their bodies. Not all who begin the journey will live to see its end.
When a boy watches the Devil King tear his father from the world, vengeance becomes his only purpose. Bound to a blade bathed in the blood of ancient devils, he joins a ruthless cousin and an unexpected ally—the Devil King’s own forsaken son. Together, they carve a path through the ranks of hellspawn, facing horrors that twist the line between man and monster. But as they draw closer to the throne of darkness, the weight of blood, betrayal, and sacrifice threatens to shatter more than just their bodies. Not all who begin the journey will live to see its end.
A boy named Mortis Theristis is pulled between two worlds. On Earth he’s a regular kid, wanting to skip school to train; in the Underworld he’s the last hope foretold by prophecy. Lucifer - who has already murdered the Theristis bloodline - destroys the family home and kills Ander and Machira while Mortis watches helplessly. With his final breath, Ander tells his son to find his cousing - one of the last remaining demon slayers - Gallord. Mortis, now burning with vengeance, vows to finish what his bloodline started: Lucifer’s complete annihilation.
Wandering the wilderness with nothing but vengeance in his heart, Mortis begins his search for the devils who tore his world apart. But the silence of the woods is shattered when he is ambushed by Protos—one of the last 5 remaining devils—and his horde of demons. Overwhelmed and on the brink of death, Mortis is saved by a final gift: the awakened strength of the demon slayers, granted by his father’s spirit from beyond the grave. With his newfound power, he crushes the demon army—but Protos proves far beyond his reach. Broken and bloodied, Mortis is left alive… as a warning.
Still bleeding from his defeat, Mortis awakens in the care of Arthur Pontiac, the reclusive doctor who once owed his life to Mortis’ vanished grandfather. As his wounds begin to heal, Arthur becomes more than a healer—offering Mortis harsh lessons in survival, combat, and the true nature of the devils. With renewed strength and purpose, Mortis sets out once more, following the scorched trail left behind by Protos. His pursuit leads him to a village engulfed in flames—where fate brings him face to face with the monster he failed to kill.