After miraculously surviving a jump from his burning plane, RAF pilot Peter Carter encounters the American radio operator to whom he has just delivered his dying wishes and, face-to-face on a tranquil English beach, the pair fall in love. When a messenger from the afterlife arrives to correct the clerical error that spared his life, Peter must mount a fierce defense for his right to stay on earth.

A headstrong young woman travels to the Scottish Hebrides to marry a rich industrialist. On the way, she meets a young naval officer and realizes that some things are more important than money.

As the voice-over proclaims, the 49th parallel is the only undefended frontier in the world. The parallel is the goal of a small group of Nazis, survivors of a U-boat that has been spotted and sunk in Hudson Bay, deep in Canadian waters. The United States is not yet at war with Germany, and if Corporal Hirth and his six crew members can reach it, they can be repatriated to Germany with no fuss. But their trek across Canada becomes a fierce struggle...