Modern examinee Qin Shu time-travels into a book to become a short-lived cannon-fodder female supporting role in an immortal sect. The original owner's identity would be exposed after eight years, and she would die a miserable death as a cauldron with low cultivation. To save her life, Qin Shu embarks on a crazy path of internal grinding, staying up late to cultivate bitterly in the moonlight, accidentally unlocking the Innate Moon Spirit Body, and causing her cultivation speed to skyrocket. She picks up a severely injured little black snake, who turns out to be the Demon Lord Xie Shiyuan, and successively gathers divine beasts and reclusive masters around her. After entering the Alchemy Sect, she grapples with herbs and practices swords day and night, touching the elders with her extraordinary comprehension and being accepted as a closed-door disciple alongside the genius Chiyu. While frantically hoarding spirit stones and refining cultivation methods, she uncovers the heavy conspiracies behind the identity-replacement case of that year, facing head-on the crises of the Five Decays of Heaven and Man and the chaotic troubled times.