Zhou Ye, an assistant at a pet hospital with no veterinary license, saves a badly injured fox demon. Yet the "Compendium of Ten Thousand Demons" labels the eighty-seven-year-old senior executive of the Demon Administration Bureau a "three-year-old toddler" and legally registers her as his daughter. Meanwhile, Zhou Ye, who fears death and loves keeping accounts, is forced to become the last "Demon Father" of the demon race.
