In the winter of 1876, the beautiful young madam India Black is busy as usual: keeping her tarts in line and avoiding the police. But when Sir Archibald Latham of the War Office dies of a heart attack while visiting her brothel, India is thrust into a deadly game between Russian and British agents who are seeking the military secrets Latham carried. Blackmailed into recovering the missing documents by the British spy known as French, India finds herself dodging Russian agents, seducing spies and embarking on midnight sleigh rides, not to mention ignoring the attraction she starts to feel for her handsome and exasperating British co-conspirator.