Spiritual energy lay hidden for a thousand years, then quietly returned to the modern world. Demons and monsters emerged, and a world-shaking transformation swept across the land.
Lin Yu was just another office drone stuck working 996 hours a week. After dying suddenly from overwork, he transmigrated to a parallel world and was forced to take over his family’s nearly bankrupt zoo through an inheritance. The animals were on their last legs, the debts were mountainous, and the future looked bleak. His life seemed to have plunged into an endless abyss. Then, by chance, he awakened the System. With its help, even the black dog guarding the zoo became a demon king. But when demons and monsters tore through their seals and returned to the world, they began to question reality: Why are there demon kings everywhere out here?
