Audrey Rose Wadsworth and her partner-in-crime-investigation, Thomas Cresswell, are en route to New York to help solve another blood-soaked mystery. Embarking on a week-long voyage across the Atlantic on the opulent RMS Etruria, they're delighted to discover a traveling troupe of circus performers, fortune tellers, and a certain charismatic young escape artist entertaining the first-class passengers nightly. But then, privileged young women begin to go missing without explanation, and a series of brutal slayings shocks the entire ship.