Lu Yu arrives in a bizarre spirit beast world where evil gods lurk and ancient taboos awaken from the depths of time. In this world, birds and beasts, mountains and rivers, and even elements can develop sentience and become spirit beasts. Powerful spirit beasts create their own ecological niches, radiating out into ecological realms such as the Yellow Spring Secret Realm, the Bone Kingdom, the Succubus Nest, and the Celestial Tree Kingdom, nurturing countless followers. Beast Masters forge contracts with spirit beasts, cultivating and controlling their spirits. After witnessing the "Forbidden Sun" event, Lu Yu gains the ability to extract materials from all things and create "Secret Foods." Evolutionary Secret Foods, such as using a "Broken Twilight World" + "Ancient Dragon Dead Egg" = "End of Days Feast," allow spirit beasts to evolve into End of Days Dragon Gods, with twilight realms corrupting the world, transforming them into apocalyptic gods. Skill Secret Foods allow spirit beasts to plunder the skills of all things.