Sophia Grieve is bound by a family curse: if she kisses a man, she will transform into a puppy at midnight. The only way to break the spell is for the same man to kiss her while she is in dog form. If she fails to break the curse within 100 days, she will remain a dog forever. After accidentally kissing CEO Wesley Sandford while drunk, she must find ways to get close to him—only to discover he suffers from severe cynophobia (fear of dogs). Meanwhile, wealthy heiress Lydia Lambert, who is infatuated with Wesley, repeatedly tries to sabotage Sophia and even conspires with antagonist Ben Hatley to frame her. From then on, Sophia lives a double life—human by day, where affection quietly grows between her and Wesley, and dog by night, leading to a series of hilarious and chaotic cohabitation mishaps. Thus begins a wild, curse-defying drama filled with schemes, farce, and unexpected love.