Marlo still has a few days to give birth to her third child whom she had not planned since she was 40 years old. Having an eight-year-old girl and a six-year-old boy who is in the autism spectrum is not at all easy to cope with a newborn. Her husband, Drew, is full of good intentions, but travels too much in the interest of the job and can not help at home. Although initially rejects the idea of hiring a bone, she gives up her everyday weight and accepts to hire Tully, which comes as a kind of “gift” from Marlo’s wealthy brother. It integrates nicely into her family, becoming even more than just a nanny.