Ordinary girl Gu Xiaoqi stays up late reading books and accidentally travels into a book, transforming into a small snow fox sent into the demon palace as an antidote by the righteous path. Demon Lord Ye Wujin has guarded the abyss for years, suffering from demonic energy torture, and was even plotted against by Bai Linger with forbidden drugs. The male protagonist accidentally can hear all of the female protagonist's inner complaints, repeatedly resolving crises thanks to the female protagonist's reminders. Gu Xiaoqi possesses the bloodline of the Nine-Tailed Divine Fox, her destiny stolen and replaced by Bai Linger. Together, the two expose the immortal realm's conspiracy, quell the catastrophe of the Ten Thousand Demons Abyss, go through mutual salvation, and finally stay together to forge a good marriage.