The film was based on the 1943 novel Commandos by Elliott Arnold, adapted by George Sklar, with a screenplay by Melvin Levy and Lewis Meltzer.

Nicole Larsen (Merle Oberon) is a member of the Norwegian resistance in a small town, about to marry the Nazi commandant (Carl Esmond).

When his superiors begin to suspect her, the Allies land an assassin to kill him: her former lover, Capt.

[1] The film was originally to have been set in France, but was changed to Norway because of the public's interest at the time in the occupation of that country.

[1] Oberon and Aherne had played the leads in Beloved Enemy in 1936, with David Niven in a large supporting role.