This story takes Shen Qingci and Ye Yuan's search for soul fragments across three lives and ten lives as the main line, and weaves an affectionate entanglement across the five realms of humans, gods, ghosts, demons, and beasts. The plot is ups and downs, rich in emotion, and full of fantasy and a sense of fate.
From the initial meeting on a snowy night, the contract of exchanging three hundred years of maidservant for his father Yangshou opened the prelude to their fate, but it also concealed Ye Yuan's coveting of the "soul flower" in Shen Qingci's soul due to the Burning Heart Curse. The flower on the other side of the Forgotten River witnessed the establishment and collapse of trust, Shen Qingci's despair when he learned that he was just a medicine guide, and Ye Yuan's endured pain under his seemingly indifferent attitude, which constituted the first level of emotional tension.