In a fantastical steam-powered world, eccentric aristocrat and secret arms dealer, Miss Constance Haltwhistle, has been blackmailed into stealing alien artifacts from the crown heads of Europe. Only the shady but annoyingly handsome US spy, "Liberty" Trusdale, can help her execute her perfect palace heists. As Constance creates chaos and mayhem across the Continent, monstrous creatures are plotting an interdimensional invasion of Earth. Will Constance and Trusdale stop bickering long enough to end the war of the worlds before it starts?