A simple guy, Zhenya, works as an accountant and cannot admit to his colleague Alice that he is in love with her. All Zhenya wants is to be with his beloved. Real magic happens: the witch boss turns Zhenya into a Jack Russell terrier, and he becomes Alice's pet. They wake up together, go for walks and fight off numerous fans — in a word, an ideal life. Zheka even thinks about staying a dog, but Alice is in danger on the next full moon, so she urgently needs to find a way to turn back into a human.