Summoned by the new, fanatically determined Chief Constable, Harriet Martens is startled to be greeted with the blunt question: "Who killed the Preacher?" She is then tasked with making use of the latest DNA techniques to investigate the murder, thirty years ago, of a charismatic youth known as the Boy Preacher, strangled in the empty ballroom of the city's Imperial Hotel, a building now slated for demolition.

Summoned by the new, fanatically determined Chief Constable, Harriet Martens is startled to be greeted with the blunt question: "Who killed the Preacher?" She is then tasked with making use of the latest DNA techniques to investigate the murder, thirty years ago, of a charismatic youth known as the Boy Preacher, strangled in the empty ballroom of the city's Imperial Hotel, a building now slated for demolition. However, she finds that only seven people had access to the scene, and Harriet has to rely on her ability to make connections that past investigators have missed...