With friends like these, who needs enemies? Liv Travers never knew real friendship until she met fellow mums Beth and Binnie. The three women become soulmates as they muddle through early parenthood together. They understand Liv like no one else does, not even Liv's husband, Pete. Then along comes Ange. Ambitious, wealthy and somehow able to do it all under Ange's guiding presence, the group finds new vigour and fresh aspirations – bigger houses, better schools, dinners at exclusive restaurants. But Liv is struggling to keep up with this expensive new lifestyle. When the four families holiday together on a beautiiful Greek island, Liv seizes the opportunity to reclaim her place at the heart of the group. But she is soon to discover the true, devastating cost of a friendship with Ange.