Sadie Roper moves back to London. First, she needs to get her daughter settled into a new school. Next, she's going to get back the criminal barrister career she sacrificed for marriage ten years earlier. Nothing goes quite as planned. The school is not very welcoming, her daughter hasn't made any friends yet and the mothers are as competitive as their children. Sadie finds herself on the outside. Julia, queen of the school moms, befriends Sadie.