A family with a dark secret. A child who refuses to speak. Rosie must help her before it's too late. Nine-year-old Caitlin has a secret, but she cannot tell anyone about it. When her mother is sectioned under the Mental Health Act she and her three siblings have to go and live with her grandmother Julie and grandad Ryan. Caitlin finds her new living conditions challenging: cat poo on the carpet, rubbish everywhere and the constant stare of her grandad - she retreats more and more into herself. When foster carer Rosie Lewis meets Caitlin she knows something is deeply wrong with this little girl, who is withdrawn, afraid and refuses to speak. Rosie decides to take her in, but Caitlin's silence continues, and Rosie knows she must act. Why is Caitlin so afraid to speak? Could it be that the family has a dark secret? One that is so shocking it can no longer be hidden?