It’s 1940 and, despite having thwarted a Nazi plot in Lisbon to release deadly uranium over London, Harry Antonelli has succeeded in wearing out his welcome in Portugal. He has that knack.

So, Harry hops a freighter to Havana, but he soon finds himself on the outs with the gangsters who run Cuba. He is taken in by the beautiful daughter of an army general, who barely tolerates her gigolo. After the bombing of Pearl Harbor, the general seizes the opportunity to ship Harry home to do his patriotic duty.

But, all is not well in Seattle either.

Harry returns home to find his best friend, Saburo (Chuck) Shimizu, and his family being loaded onto a bus and moved to an internment camp, so Harry decides to aggressively intervene.

David Booth-operative of an ultra-secret government agency, and brother of Dorothy, Harry’s ex-girlfriend-springs Harry from jail. David, who disapproves of Harry in general, asks him to woo Dorothy. He fears her current beau may be an enemy agent. The Agency believes that a plot is brewing to sabotage Boeing’s production of the B-17-the bomber vital for destruction of Germany’s war machine-and to kill thousands of workers in the process.

As part of his effort to help David root out spies and saboteurs, Harry accepts the mission of courting Dorothy, who happens to be on a secret assignment, too.

Harry does have help on his impossible mission: an alcoholic ex-cellmate and his band of cohorts, and a spry 82-year-old widow.