As the story goes on, the legendary gumiho (later called Miho) wants to be human. Miho (Shin Min Ah) is informed by a veterinarian named Park Dong Joo (who is half human) that she must drink his blood to become a human in 100 days while Dae-woong will have to keep her magical fox orb meanwhile. Moreover, Dae Woong will not be able to date anyone else but gumiho within the 100 days. However, Dong Joo doesn't tell Miho that in 100 days, in order to become human, Dae Woong must die. Trouble brews when Miho and Dae Woong eventually fall in love.