In 1914, despite the threat of war in Europe, Pearl Gibson's future is bright. She has secured a desirable position as a lady's maid for Lady Ottoline Campbell. Her new role sees her transported from a life of drudgery to the Campbell's vast Scottish estate. Pearl is quickly drawn into a whirlwind of intrigue, glamour and scandal, as she realises her job requires her to become her lady's confidante as well as her maid. In the confusing world of the upper classes it is Ottoline's cousin, Ralph, who Pearl comes to rely on, trust – and love. But when violence erupts in Europe, Pearl and Ottoline's world is irrevocably changed. As the men in their lives are called to the front line, shocking events unfold at home that both Pearl and Ottoline vow never to reveal. They share a secret that will test their loyalty to one another to breaking point, and will bind them together forever…