On a train headed for England a group of travelers is delayed by an avalanche. Holed up in a hotel in a fictional European country, young Iris befriends elderly Miss Froy. When the train resumes, Iris suffers a bout of unconsciousness and wakes to find the old woman has disappeared. The other passengers ominously deny Miss Froy ever existed, so Iris begins to investigate with another traveler and, as the pair sleuth, romantic sparks fly.
Margaret Lockwood
as Iris Matilda Henderson
Michael Redgrave
as Gilbert Redman
Paul Lukas
as Dr. Hartz
May Whitty
as Miss Froy
Basil Radford
as Charters
Naunton Wayne
as Caldicott
Cecil Parker
as Eric Todhunter
Linden Travers
as 'Mrs.' Margaret Todhunter
Mary Clare
as Baroness Isabel Nisatona
Emile Boreo
as Boris the Hotel Manager
Googie Withers
as Blanche
Sally Stewart
as Julie
