Jung Nabi  is a hopeless romantic girl and all she hopes is to find her soulmate. But she never imagined to be with her cat, Seonghwa who turned into a human. Nabi was frighten and confused at first, but Seonghwa on the other hand is in love with her and can't seem to know how to make her to understand that he is all she needs. He has up to the next full moon to make her fall in love with him,  before he turns back into a cat.