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In the future (1921), an alliance of several foreign countries plot to attack the US. American officials, coming to the realization that the country is basically defenseless, offer $1,000,000 to anyone who can come up with a weapon to defeat the invaders. Winthrop Clavering, a writer and inventor, hears of the reward and tells his friend Bartholomew Thompson, a scientist and inventor who has been working on developing flying torpedo. However, enemy agents have also heard about Thompson's project, and set out to kill him and steal his plans.
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