In a distant future where civilization has crumbled and remnants of ancient technology linger as myth, a young man is raised within a guild dedicated to torture and execution. Trained to be devoid of compassion, one moment of mercy causes him to break a sacred rule, leading to his exile from the only home he's ever known.

Carrying a legendary sword and haunted by memories of his transgression, he embarks on a perilous journey through decaying cities where reality and illusion intertwine. Along the way, he encounters formidable foes, enigmatic allies, and mysteries that challenge his understanding of himself. His fate becomes intertwined with the fate of a dying world, the promise of a renewed age, and the elusive truth of a waning sun.