A puzzling locked-room mystery that puts someone Oldroyd loves in terrible dangerWhen a film shoot on Wharfedales vintage railway turns into a grisly crime scene, DCI Oldroyds idyllic visit to the countryside with his partner Deborah is well and truly stopped in its tracks. One of the films stars has been shot dead in a train carriage while the cameras rolled outside. But nobody else went inor came out. Has the killer really pulled off the perfect, impossible crime?Scouring the victims past for clues, Oldroyd soon unearths a string of heartbroken lovers and a mountain of unpaid debts, each adding to the growing list of suspects. But before he can determine who the culprit is, theres the small matter of figuring out how they did it. A potential connection to a previous tragedy offers Oldroyd a much-needed leadWhoever the perpetrator is, they are ruthless and determined to avoid detection, and when a railway worker starts joining the dots, they are quickly silencedfor good. But as Oldroyd gets ever closer to the truth, its only a matter of time before he is given a chilling warning to back off.Perhaps Deborah should have stayed somewhere safe