The drama is adapted from the webtoon of the same name. A male nine-tailed fox who has lived in modern society for hundreds of years wants to become a human. When he is about to achieve his goal, an accident occurs and a female college student takes away the fox bead. The human body cannot withstand the fox bead for a long time. If the female college student who accidentally eats the bead does not take it out, she will die in a year. In order to solve the problem, the female college student who is facing death and the male nine-tailed fox who cannot become a human begin to live together.