Cha Dae-woong (Lee Seung-Gi) is a normal college student, with ambitions of becoming an action star. One day, he accidentally releases a gumiho (Shin Min-ah), a legendary fox with nine tails who was sealed inside a painting by Samshin Grandmother. Fleeing the scene, Dae-woong suffers a life-threatening fall and is only saved by the gumiho giving him her "fox bead". When Dae-woong awakes and meets a mysterious and very beautiful girl, he initially treats her as eccentric or mentally ill, before she discloses that she is actually a gumiho in human form. According to myth, gumihos eat men's livers, so Dae-woong is scared out of his wits, and the gumiho takes advantage of his fear by sticking by his side. He names her "Mi-ho," and keeps her happy by buying her beef and hiding her true identity. Mi-ho wants nothing more than to become human, so they strike a deal:...