Frances (Beattie Edmondson) seems to have been unlucky recently. She has a broken heart in her career and her grandmother has passed away. In desperation, Frances had to adopt her grandmother's dog, a pug named Patrick. Frances herself doesn't like animals, and the apartment where she lives also explicitly prohibits pets. Patrick's existence makes Frances tremble with fear all day long. Besides, Patrick is not a good person. He is greedy and naughty, causing trouble for Frances all day long, which makes her owner wonder if he is sent by God to punish him? Although raising a dog faces various difficulties, it is also a lot of fun. In the process of raising a dog, Frances met the handsome veterinarian Oliver (Ed Skrein) and the dog lover Abin (Tom Bennett). The expansion of the social circle has gradually freed Frances from the state of a former resentful woman.