A brand new edition of the classic crime novel that inspired Alfred Hitchcock.Glamorous socialite Iris Carr is on her way back to England from a European summer holiday and looking forward to the comforts of home. On the train to Trieste, she strikes up a conversation with the kindly Miss Froy. At ease with her new companion, Irene dozes off, but wakes to find that Miss Froy has disappeared from the train. Worse still, all of her fellow passengers deny ever having seen such a woman. Doubting her sanity and fearing for her safety, Iris is determined to find the vanished lady, but it seems almost everyone else aboard is conspiring against her, and soon she realizes Miss Froy's life is at stake...