A demon spirit possesses a dying mercenary on the battlefield and reanimates him with dark power. The reborn warrior defeats twenty rulers in brutal combat and founds the reign of the Demonlord Raith. A shaman delivers a prophecy: a child born on a night of blood will one day rise to kill the Demonlord in single combat. Against his advisors' urging, Raith refuses to kill the children born that night—choosing to wait for his foretold destroyer instead.
Years pass. The demon Zarak deposes Raith and seizes the title of Demonlord. Twenty-five years after the prophecy, Zarak hosts a great tournament of champions. The winner earns the right to face the Demonlord—and claim their destiny as the WeaponLord.