Normally, Dam Lee, a 24-year-old woman, would never consider living with a stranger, let alone a 900-year-old one. But these are not ordinary circumstances. By accidentally ingesting a gumiho bead, a nine-tailed fox from Korean mythology named Wuyeo Shin, Dam risks death within a year, and Wuyeo will never become human. Can they discover a way to safely extract the bead within the time-frame? Moreover, will Dam ever have the opportunity to find love while struggling against her extraordinary situation that limits her romantic prospects?