Wraiths appeared, plunging humanity into a survival crisis. Wraith Tamers subjugate them. Kai Linden is betrayed by his best friend and lover, his Power Level destroyed. On the brink of death, he awakens the Zhong Kui System, accumulating power by refining Wraiths. He increases his Power Level in trials, thwarting The Sacred Order of Wraiths' plots to sacrifice civilians. Kai Linden heads to the front lines to face the source of the Wraiths and safeguard all life.