Hoping to make a clean break from a fractured marriage, Agatha Christie boards the Orient Express in disguise. But unlike her famous detective Hercule Poirot, she can't neatly unravel the mysteries she encounters on this fateful journey. Agatha isn't the only passenger on board with secrets. Her cabinmate Katharine Keeling's first marriage ended in tragedy, propelling her toward a second relationship mired in deceit. Nancy Nelson--newly married but...