A government agent is returning from France with secret blueprints that were stolen from his government. On the train ride home, thieves break into his compartment and murder him.
John Warwick
as Frank Drayton
Jenny Laird
as Barbara lane
Paul Neville
as Vautel
Ivan Wilmot
as Veinberg
Aubrey Pollock
as Sir James Garfield
Victor Hagen
as Carlton
Nigel Barrie
as Sir Donald Frame
Sybil Brooke
as Hotel Manager
Dorothy Dewhurst
as Miss Parker
