Captain Mills is jealous of Jim Clifford, his fellow officer at the British War Department, so he steals an important document in an attempt to make Clifford look bad.
In the future (1921), an alliance of several foreign countries plot to attack the US. American officials, coming to the realisation that the country is basically defenceless, offer $1,000,000 to anyone who can come up with a weapon to defeat the invaders.
The story takes place in Monte Carlo, where the impoverished Julian proposes marriage to the wealthy Dora, only to be turned down by the girl's mercenary mother.