As an old house is demolished in a gentrifying section of London, a workman discovers a tiny skeleton, buried for years. For journalist Kate Waters, it's a story that deserves attention. She cobbles together a piece for her newspaper, but at a loss for answers, she can only pose a question: Who is the Building Site Baby? As Kate investigates, she unearths connections to a crime that rocked the city decades earlier. But there is more to the story, and Kate is drawn - house by house - into the pasts of the people who once lived in this neighborhood that has given up its greatest mystery.
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