The North American continent has been torn apart by civil war. Steam-powered behemoths stalk the landscape, dirigibles prowl the skies and society stands on the back of a new class of slaves known as 'mechanicals'. The conflict between the Union and the Confederacy has dragged on for twenty-five years with neither side coming close to victory. Something is needed to tip the balance...
Lazarus Longman - antiquarian, explorer and treasure hunter for the British Empire - had heard of the Seven Golden Cities of Cibola, but he never believed they really existed. So when he was ordered to track down the only two men rumored to have seen the fabled land he was skeptical to say the least. His skepticism turned to desperation when he found out that his quarry was Gerard Vasquez; a degenerate gambler, drinker and pistoleer and his companion, Hok'ee; a towering Navajo with a ferocious temper and a mechanical gun-arm.
The British want these men delivered into the hands of the Confederacy so that the war can be brought to a swift resolution. But not everybody wants the Confederacy to win. Especially not Tsar Alexander III who has dispatched his own deadly assassin to ensure the Confederates never get their hands on America's golden heart.