In a world where every living creature is born with a soul, one boy is born without one.
His name is Sou, and from the moment he entered the world, he was branded a curse. Hunted by the Holy Church and feared by everyone around him, Sou survives alone in the shadows, believing kindness has no place in his life.
Everything changes when a single act of compassion and a desperate choice force him onto a path he can never escape. Branded a monster, Sou must uncover the truth behind his mysterious birth while evading those who would kill him—or dissect him to learn the secret of his existence.
As ancient mysteries awaken and powerful enemies close in, the boy without a soul may become the greatest threat the world has ever known... or its only hope.
In a world that rejected him from the very beginning, Sou must decide what kind of person he will become.
