Crusty Dr. McRory of Fallbridge, Maine, hires his temporary replacement sight unseen. Alas, he and young, singing Doctor Jim Pearson don't hit it off; but once Pearson meets teacher Trudy Mason, he is delighted to stay. The locals, taking their cue from McRory, cold-shoulder Pearson, especially Trudy's stuffy fiancé. But then, guess who needs an emergency appendectomy?

Lotus Long plays the title role, an American-educated Japanese woman broadcasting enemy propaganda to American troops. Captured GI Pete Sherman is one of a group of POWS slated to be interviewed on Tokyo Rose's radio program. Instead of advising his comrades to surrender (as ordered), Sherman uses his innate Yankee knowhow to hoist the treacherous deejay on her own petard. Managing to make his escape, Sherman hooks up with the Japanese Underground, convincing anti-militarist Charlie Otani to aid in a kidnapping plot aimed at Tokyo Rose.

Two discharged service men go to the redwood country in northern California to visit the family of a buddy killed in the war. There, they find the family's trucking business is being threatened by a rival who will stop at nothing to ruin their business. They take up the fight against the crooks.