The computer age has arrived a century ahead of time with Charles Babbage's perfection of his Analytical Engine. The Industrial Revolution, supercharged by the development of steam-driven cybernetic Engines, is in full and drastic swing. Great Britain, with her calculating-cannons, steam dreadnoughts, machine-guns and information technology, prepares to better the world's lot ...
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1855年，人类已经利用差分机技术步入计算机时代。

诗人拜伦成为英国首相，疯狂推进差分机技术。凭借差分机构建的强大情报网，英国特工渗透进美国，使其分崩离析。马克思和恩格斯在纽约成立公社，企图建立一个社会主义美国。与此同时，拿破仑三世统治下的法国研发出名为“拿破仑大帝”的超级差分机，英国的霸主地位岌岌可危。
这时，人称“差分机女王”的拜伦之女编写出一套神秘代码，其中潜藏的无尽财富与权力，让隐身在伦敦迷雾中的各方势力纷纷露出头来……