While vacationing in St. Moritz, a British couple receive a clue to an imminent assassination attempt, only to learn that their daughter has been kidnapped to keep them quiet.

Leslie Banks
as Bob Lawrence

Edna Best
as Jill Lawrence

Peter Lorre
as Abbott

Frank Vosper
as Ramon Levine

Hugh Wakefield
as Clive

Nova Pilbeam
as Betty Lawrence

Pierre Fresnay
as Louis Bernard

Cicely Oates
as Nurse Agnes

D.A. Clarke-Smith
as Binstead

George Curzon
as Gibson