A Xuan, a graduate student in botany, is transported to the wasteland of the Demon Realm, where he becomes a dying little tree demon. Awakening his innate life essence and an ancient demon seed treasury, he cultivates spiritual plants and turns barren land into fertile soil. He takes in wandering demon clans, including Hu Xiaoyao, Hei Yan, and Huangmao Xiaoyao, repels plundering tribes, and establishes an alliance of ten thousand demons. By purifying ancient ruins tainted with demonic energy and harnessing the power of spiritual plants, he builds a thriving nation of ten thousand demons.