In the ancient mythological era, a war broke out between the gods and demons for dominance of the world. The god Chiyuan was demoted to the mortal world because he disobeyed the emperor's order to release a demon child privately. He lost his memory and became a mortal Orion Yunyuan. The demon princess Liyue sneaked into the human world to find her missing young brother and unexpectedly met Yun Yuan. The two met each other without knowing each other's true identity, and were involved in a huge conspiracy involving the life and death of the Three Realms. From the human world to the heavenly world, from the demonic realm to the underworld, they gradually discover the secrets behind each other's identities, and uncover a shocking scam that has been planned for tens of thousands of years - gods and demons are of the same origin, and the truth of the war is actually to cover up a terrible fact that can subvert the three realms.
