Contraband plot
"Stop that man and woman! His mission is deadlier than that of the enemy in the sky. Her beauty is a dangerous weapon of war!"
Andersen, the Danish captain of a wartime freighter, has arranged passes for himself and his first officer to land in London. However, these are stolen by the mysterious passengers "Mrs Sorensen" and "Mr Pidgeon". Andersen follows them as they disembark, but he is kidnapped along with the beautiful and mysterious Mrs. Sorensen. He becomes entangled in a spy affair involving Nazis operating underground in London.