Glamorous and nearing forty, Tess drops a bombshell on four of her friends: she's pregnant. Sierra may be only twenty-three but she s had to grow up fast. Michael is busy searching for Mrs Right, while Owen eases the pain of a mid-life crisis with a string of unsuitable fiancees. Only Lucy has the trappings and offspring of a proper grown-up, but is terrified of ageing. On a challenging and hilarious journey through birth, Botox, bad sex and beyond, all five friends must discover that while growing old is inevitable, growing up is optional.