A stunning new adaptation of the classic 1930s thriller that sees a beautiful; spoiled young woman risking her life to solve the mysterious disappearance of her traveling companion. Iris Carr is traveling across Europe by train when she unwittingly becomes embroiled in a sinister Balkan plot. Feeling disorientated after a fall; Iris is befriended by Miss Froy; an elderly English woman sharing her carriage. But when she wakes up from a few hours' sleep; Miss Froy has vanished without trace. As fellow passengers claim the lady never existed; Iris faces danger and intrigue as she fights to discover the fate of Miss Froy - and prove that she's not going mad.