Gu Shisan is an evil ghost who climbed out of the abyss.
Gu Yu is the mobile blood bank and cannon fodder of Gu Linlang, the destiny heroine in the book.
When the evil ghost returned to the stupid cannon fodder, he actually messed up his original destiny and galloped away, never to return.
This is a cool story with a strong female protagonist. Have fun watching it, and collect it if you like it.