Ever since Lady Houtu created the six paths of reincarnation and founded the Underworld, the souls of those who died unjustly have had a place to be reborn. Five thousand years have passed, and the ghosts in the Underworld are now beyond counting, numbering over a billion. Quite a few Ghost Kings have even emerged among them. Sensing a threat, the Jade Emperor decides to secretly send a hundred thousand heavenly soldiers to wipe them all out. But despite all his calculations, he underestimates the loyalty of his subordinates. Afraid that they will be discarded once they are no longer useful, the Underworld's gods and ghosts choose to protect themselves, making a decision that plunges the world into chaos. From then on, the Underworld's ghost soldiers begin to fight back against the mighty heavenly army.
