The seal on the abyss in the Underworld cracked. To prevent the demon king deep within from emerging and wreaking havoc in the human world, the Underworld King Luo Chen took on the identity of a mortal demon hunter and set out to find the five crystals of metal, wood, water, fire, and earth needed to reseal it. The Immortal Realm's God of War, Shen Du, was ordered by the Jade Emperor to descend to investigate what had broken the seal, and arrived in the mortal world disguised as an ordinary demon hunter. The two traveled together to hunt demons, each believing the other was just another fellow practitioner. But after one perilous battle after another, their secret identities were exposed one by one…
