The Black Dragon Dances, the Clouds Soar

Prologue: The Lord of the Underworld and the Primordial Heavenly Venerable fought for the position of Heavenly Emperor. Though defeated, the Lord of the Underworld ultimately escaped the Primordial Heavenly Venerable's sphere of control. The Primordial Heavenly Venerable was gravely weakened and could no longer track down the ruler of the underworld, who had vanished once more into the mortal world. But wherever the Lord of the Underworld exists, peace is bound to be lost.