On a cold, bleak day in 1916, a mining pit in Siberia turns into a bloodbath when its miners attack each other, savagely and ferociously. Minutes later, two men - a horrified scientist and Grigory Rasputin, trusted confidant of the tsar - hit a detonator, blowing up the mine to conceal all evidence of the carnage. In the present day, FBI agent Sean Reilly is tasked with a new, disturbing case. A Russian embassy attache seems to have committed suicide by jumping out of a fourth-floor window in Queens. The apartment's owners, a retired high school teacher and his wife, have gone missing, while a faceless killer is roaming New York City, leaving a trail of death in his wake. Joined by Russian FSB agent Larisa Tchoumitcheva, Reilly's investigation into the old man's identity will uncover a deadly search for a mysterious device whose origins reach back in time to the darkest days of the Cold War and to Imperial Russia and which, in the wrong hands, could have a devastating impact on the modern world.