Lin Yan, a modern office worker, dies unexpectedly and transmigrates to the impoverished Qingwu Village in the world of cultivation, where he becomes a boy with the same name. He struggles for three hundred years in this world where the strong prey on the weak, rising from an unaffiliated cultivator just beginning to gather qi to a mighty tribulation-surviving powerhouse. But just as he is about to ascend, a spatial rift sends him back to the modern world he no longer recognizes. Only three years have passed since his “death,” and his only younger sister, Lin Xi, is sinking into depression and hardship. The shadows of their parents’ early deaths and the crushing weight of daily life have turned the once lively girl quiet and withdrawn. Carrying memories of three hundred years of cultivation and immense power, Lin Yan resolves to make up for the regrets of his past life. Using the resources and methods of the cultivation world, he will pave a path to immortality for his sister, far from suffering. While hiding his identity and adapting to modern life, he secretly cleanses and strengthens her meridians and helps her begin cultivating qi. Meanwhile, Su Qingyuan, a doctoral researcher specializing in ancient biology and anomalous energy, crosses paths with the siblings after an eerie archaeological discovery. She senses the extraordinary aura around Lin Yan and is drawn to Lin Xi’s transformation. The three become entangled in a story of warmth and adventure on the border between the modern world and the world of cultivation. The emotions are tenderly rendered, from the siblings’ devotion to one another across life and death, to the deepening bond between the male and female leads as they move from wary testing to trust, and the struggles and growth of ordinary people as they encounter a chance at immortality.