How far would you go to have a family? What would you hide for someone you love? Confused and desperate, Zoe McAllister boards a ferry to Rottnest Island in the middle of winter holding a tiny baby close to her chest, terrified that her husband will find her or that her sister will call the police. Years later, a teenage girl, Louise, is found on the island, unconscious and alone. Flown out for urgent medical treatment, when she recovers she returns home and overhears her parents discussing her past and the choices that they've made. Their secrets, slowly revealed, will shatter more than one family and, for Louise, nothing will ever be the same again.