Spring 1937: Teresa is evacuated to London in the wake of the Guernica bombing. She thinks she's found safety in the soothing arms of Mary Davidson and the lofty halls of Rochester Place, but trouble pursues her wherever she goes. Autumn 2020: Corrine, an emergency dispatcher, receives a call from a distressed woman named Mary. But when the ambulance arrives at the address, Mary is nowhere to be found. Intrigued, Corinne investigates and, in doing so, disturbs secrets that have long-dwelt in Rochester Place's crumbling walls. Secrets that, once revealed, will change her life for ever... Who is Mary Davidson? And what happened at Rochester Place all those years ago?