Adelaide Hills, Christmas Eve, 1959: At the end of a scorching hot day, beside a creek in the grounds of the grand and mysterious house, a local delivery man makes a terrible discovery. A police investigation is called and the small town of Tambilla becomes embroiled in one of the most shocking and perplexing murder cases in the history of South Australia. Many years later and thousands of miles away, Jess is a journalist in search of a story. Having lived and worked in London for almost twenty years, she now finds herself laid off from her full-time job and struggling to make ends meet. A phone call out of nowhere summons her back to Sydney, where her beloved grandmother, Nora, who raised Jess when her mother could not, has suffered a fall and been raced to the hospital. At Nora’s house, Jess discovers a book that chronicles the police investigation into a long-buried crime: the Turner Family Tragedy of Christmas Eve, 1959. It is only when Jess skims through the pages that she finds a shocking connection between her own family and this once-infamous event — a murder mystery that has never been resolved satisfactorily.