Jack Eun-Dal is a Nous user, someone that can shape his soul to fight, but in the peaceful country of Vaalbara he finds no reason to train and prefers to live a normal life. Suddenly, the strongest Nous users began disappearing, only leaving behind an emblem depicting a black hand. Everything seems to point to the rise of the demons, forcing Jack back into the front lines. What will he do to protect the country he once thought was safe?
Will he unravel the secrets within his Legacy? What sin did he commit to be cursed?