A white domestic goose from Northeast China is transported to a world of demonic beasts while being cooked in an iron pot, where he acquires the Myriad Beasts Devouring and Evolution System. He unexpectedly forms a bond with an ancient Vermilion Bird being hunted by a jiaolong. A year later, the Vermilion Bird entrusts her children to him, giving birth to a pure-blooded little Vermilion Bird and a little yellow goose with dual bloodlines. Disguising himself as an ordinary goose, he secretly cultivates his power and protects his wife and daughters as they flee the ancient forest for a small town in the demon realm. To cure the little yellow goose, he ventures into the Ten Thousand Beasts Secret Realm in the extreme northern ice fields, evolving into the Nine Nether Hongmeng Demon Cosmos Peng-Goose. Fighting alongside the Vermilion Bird, he slays the jiaolong commander and obtains the Fruit of All Spirits to cure his daughter. He gives up the opportunity to transform into human form, and the family of four retreats into seclusion to live a peaceful, happy life.