From the depths of the underworld, the evil lurks into the human world. With an expected twist, he is met by a resilient and empowered fighter who stops anyone he believes is evil. As time goes on, they grow a bond that becomes unbreakable. However, the fighter discovers more dangerous people than the owner of the underworld. Danger forms and comes to those who are close.

Two immortal warriors who were trained by the same master have different fates. One becomes a powerful ruler that kills whoever goes against him. He goes against what many people believe. The other disappears from the world. Hidden, people began to search for him, hoping he could save the world. Their master finds his hidden place and begs for him to help. Being the only one who knows about their secret past. Can he stop his friend from destroying the world?

Ye Ying, a night guard of mystical objects, embarks on a journey after discovering a thief in his corridors. Jioalong, a lizard demon, has been living a normal life until he discovers a mysterious man with a familiar smell. Catching the man, he finds Ye Ying in a fight against the same enemy, Gui Wang, a collector for all things powerful.

From The Midnight Thief, Ye Ying and Jioalong continue their journey. The couple, broken apart from an argument, split. Ye Ying continues his mission to find his mystical objects. As the years go on, he meets an old past that comes back for revenge. Jioalong teams up with help from friends as they stop another war from coming. I suggest reading the first book before this one.