Kunlun Meng Yunge feeds on love, but has a special liking for the taste of the soul of Mo Linyuan, the cold emperor in the Netherworld. He is a loner who rises from a sea of blood in a mountain of corpses, and she is the most pampered spiritual beast under the Queen Mother of the West. An approach that begins with "foraging" ends with them falling into each other's loneliness and passion.
Their love violated the rules of heaven and led to the encirclement and suppression of Kunlun and Tianting. At the critical moment, in order to protect Mo Linyuan, Meng Yunge used forbidden techniques to swallow up a large amount of negative emotions, and his soul was scattered. Mo Linyuan searched the three realms and finally used the fragments of the Mirror of Reincarnation to reconstruct her soul, but removed all her memories and placed her beside the Naihe Bridge to live as Po Meng for three thousand years.
He thought it was protection, but he didn't know that from the moment they met, they had stepped into a shocking scam set by the Queen Mother of the West: the bloody jade pendant to guide their reunion, the perfect timing for the encirclement and suppression, and even her out-of-control instincts were all carefully calculated. The fragment of the mirror of reincarnation that he regarded as hope was quietly erasing her origins, turning her into a vessel at the mercy of others.
Three thousand years later, half of the Kunlun jade pendant accidentally awakened Meng Yunge's remaining memories. She lost her identity as Po Meng and embarked on the road back to the ruins. At the end of the world, she met a mysterious woman who had the same appearance as herself, and was shocked to realize that the so-called "rebirth" was just another imprisonment. And was the emperor who had guarded the underworld for her for three thousand years, his true love, or an accomplice who pushed her into the abyss?
When the fragments of memory piece together the truth, can the Forgotten River water wash away three thousand years of deception? Should she and him fight against the will of heaven, or should they completely break off this relationship that started by mistake?