Bringing the Keep Fit movement vividly to life in 1940s' London, Pam Evans' family saga will inspire and enthral anyone who has ever dared to dream of a better life. In the middle of a party to celebrate the Silver Jubilee of King George V in 1935, Mollie Fisher's good-for-nothing husband walks out on his wife and baby girl. Luckily, Mollie has a loving family to turn to for help. Mollie's mother, Marge, is delighted to look after baby Esme while Mollie goes out to work. Meanwhile, her nan, Nora, encourages Mollie to join a local keep fit class, which opens her eyes to a whole new world. Determined to better herself, Mollie qualifies as a fitness instructor and starts to run her own classes for the local community, where she befriends a group of women she would never have known existed. But with the outbreak of the Second World War and the ever-present danger of losing her loved ones in the London bombings, it takes courage for Mollie to stand on her own two feet...