Growing up in a wealthy enclave outside San Francisco, Justine Cowan's life seems idyllic. But her mother's unpredictable temper drives Justine from home the moment she is old enough to escape. It is only after her mother dies that she finds herself pulling at the threads of a story half-told - her mother's upbringing in London's Foundling Hospital. Haunted by this secret history, Justine travels across the sea and deep into the past to discover the girl her mother once was.