Chu Qingyan, the Lingxiao Female Emperor, and Lin Yuan, the Demon Venerable, clash in a battle that tears open the void, sending them both through time and space to modern Blue Star, a world devoid of spiritual energy. Having lost all her spiritual power, Chu Qingyan becomes an undocumented person and takes shelter in Lin Yuan's home, leading to numerous hilarious mishaps as she struggles to understand instant noodles, showerheads, mobile phones, and other modern conveniences. Blood Crow, the Demon Path's Left Protector, also arrives in this world and makes a living delivering takeout. The three accidentally discover an evil stone from the Netherworld Sect that contains spiritual energy. After Chu Qingyan absorbs it, a blood-fiend mark allows assassins to track her, drawing Netherworld killers to their doorstep. Because of their bizarre appearances, the assassins are mistaken for scammers by neighborhood aunties and subdued. Later, a theft of spiritual artifacts at an antique shop reveals traces of Netherworld forces, while the three struggle to adapt to ordinary life and make ends meet.