
Knowledge can be a deadly thing.
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.
Clive

Nova Pilbeam
Betty Lawrence

Pierre Fresnay
Louis Bernard
Cicely Oates
Nurse Agnes

D.A. Clarke-Smith
Binstead

George Curzon
Gibson

Frank Atkinson
Policeman Shot Behind Mattress (uncredited)
Betty Baskcomb
Lawrence's Maid (uncredited)