Su Wan and Lin Xingci get drunk at a nightclub and both transmigrate into a book, becoming cannon‑fodder sisters destined to be drained of their family fortune by the fox‑demon male lead and sold into the black market. They bind a survival system and must follow the original plot to return home. Seeing through Bai Jin’s venomous schemes, they turn the tables on him. Along the way, they meet two powerful demon lords—the black serpent Ling Yuan and the wolf‑tribe Yun Qi—and form symbiotic bonds with them. Together, the sisters expose the fox demon’s conspiracy, escape their tragic fate, stay with their beloved demon lords, and rewrite the ending of the entire book.