The Valley of Hell has somehow been filled with water, and the overpressure of the water has squeezed through the rock formations, taking a heavy toll on the demonic clans that live in the underworld. Prince Alois dives to the bottom of the Hell Lake to investigate and discovers that the source of the disaster comes from the tears of half a witch's head. In order to bring the witch who threw the head to justice, Alois set off to the surface.

The suddenly awakening ghost power leads to a conflict between Alois and the five ghosts that have been lingering in Agate's house. It turns out that these ghosts were all Agate's friends before death. The two sides have a negotiation at Agate's family graveyard. Alois wants all ghosts to go to the Hell Valley for reincarnation, but all ghosts want to find out the cause of Agate's suffering. In order not to hurt Agate any more, all ghosts decide to leave. They share their memories with Alois before leaving, hoping that he could find some clues. After seeing the memories of a woman called A Zhu, another child called Lv collapses, and Alois feels very weak and also the urgency.