Two billionaires, a nine-tailed fox. When Sungwoo, who aspires to lead the family company, opens his late grandfather’s jewelry box, he awakens Bi, a mythological nine-tailed fox. Meanwhile Yoosung, Sungwoo’s laid-back cousin who had never before desired anything, feels a strong attraction to Bi. With the two both chasing after Bi, so begins a twisted love triangle of fate.