On the nether Naihe Bridge, Meng Po is an innate deity coexisting with reincarnation, devoid of emotion and desire, responsible only for letting wandering souls drink soup to forget their past lives. At the end of the war between gods and demons, Demon Lord Xuan Xiao is caught in the Immortal Emperor's reincarnation array, severely injured, and falls into the netherworld. Meng Po hands him the soup according to the rules, but the soup fails for the first time due to the chaotic jade pendant on his body, causing Naihe Bridge to crack. To guard the bridge and figure out this sole exception, she hides Xuan Xiao in the Guixu crevice beneath the bridge. Xuan Xiao lets her see the freedom and mortal warmth beyond the rules, and for the first time, she lies, hesitates, and falls for a soul. Heaven detects the anomaly, and Xuan Xiao is cast into the reincarnation well to protect her. Meng Po leaves the bridge for ten thousand generations to search for him, arriving a step too late every single time,