Audrey Rose and Thomas Cresswell find themselves aboard a luxurious ocean liner that becomes a floating prison of horror when passengers are murdered one by one, with nowhere to run from the killer. Embarking on a week-long voyage across the Atlantic on the opulent RMS Etruria , Audrey Rose Wadsworth and her partner-in-crime-investigation, Thomas Cresswell, are 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 privileged young women begin to go missing without explanation, and a series of brutal slayings shocks the entire ship. The strange and disturbing influence of the Moonlight Carnival pervades the decks as the murders grow more and more bizarre. It’s up to Audrey Rose and Thomas to piece together the gruesome investigation before more passengers die before reaching their destination. But with clues to the next victim pointing to someone she loves, can Audrey Rose unravel the mystery before the killer’s horrifying finale?