After a harrowing escape from Russian agents on his last mission, Charles Jenkins thinks he's finally done with the spy game. But then the final two of the seven sisters--American assets who have been deep undercover in Russia for decades--cut off all communication with their handlers. Are they in hiding after detecting surveillance? Or have they turned and become double agents? It's Jenkins's duty to find out, but he's been added to a Russian kill...

"London, 1855: A young and eager Charles Lenox faces his toughest case yet: a murder without a single clue. Slumped in a first-class car at Paddington Station is the body of a young, handsome gentleman. He has no luggage, empty pockets, and no sign of violence upon his person - yet Lenox knows instantly that it's not a natural death. Pursuing the investigation against the wishes of Scotland Yard, the detective encounters every obstacle London in 1855...