Alva, a young boy enslaved by the kingdom, is forced into endless battles against monsters inside the labyrinth. Day after day, he fights on the brink of death, cursed with a weakening spell that should have made survival impossible. And yet, no matter how hopeless the odds, Alva continues to grow stronger—so much so that the kingdom itself grows desperate to eliminate him before he becomes uncontrollable. Then, in the depths of despair, Alva encounters a mysterious lizard. What seems like a trivial meeting becomes the turning point that will shatter his fate as a doomed slave and open a path far beyond the abyss of the Spirit Labyrinth.