Sister, Don't Go up When You're in the Dark

Ten years ago, my sister went to Dongguan to save her broken family, defrauded her boss and took away eighteen sisters! Ten years later, my sister borrowed the corpse and brought mysterious black gold and wealth, and made a Yin contract for me! Since then, I have stepped into a mysterious world, collecting corpses, transporting them, and using humanity to suppress evil spirits. Everything starts from the day my sister comes back...