1943: A schoolmaster called Stefan Novak and his watchmaker friend Tadek are working for the Polish resistance lead by Stanislav Muski and allow themselves to be captured by the Nazis and taken to a labour camp on the Baltic coast so that they can spy on the operations there. Stefan and Tadek discover that the camp houses a huge production unit where the V1 rocket is being built, which Hitler intends to use to destroy London. The pair succeed in informing the resistance of what is happening who in turn tip off the allies who launch a full scale raid on the plant and destroy it therefore setting back the Nazis' plan by months. However, the fight is far from over as Hitler's generals proceed with plans to build yet another plant and Stefan and Tadek are faced with a dangerous challenge, they must capture a complete V1 rocket and help in smuggling it back to Britain so that the allies can prepare themselves for Hitler's proposed invasion...

Michael Rennie
as Stefan

Patricia Medina
as Zofia

Milly Vitale
as Anna

David Knight
as Tadek

Esmond Knight
as Stricker

Christopher Lee
as Brunner

John G. Heller
as Fritz

Carl Jaffe
as General

Peter Madden
as Stanislaw

George Pravda
as Karewski