Hundreds of years ago, the Wolf King, leader of the demon clan, reached an agreement with the Demon King and invaded the celestial realm. The celestial realm sent its God of War, Bai Mucheng, to fight them. In the end, Bai Mucheng sealed the Demon King with his immortal marrow, then fell into the mortal world to begin his tribulation. Gravely wounded, the Wolf King returned to the demon clan to recuperate. The celestial realm knew the Wolf King would return once he had healed, but its strongest God of War had already entered the mortal world. The Heavenly Emperor could only use his own spiritual power to search for him. In the process, he met Ye Ling, and the two fell into the mortal world together to weather one trial after another...
