When reports come in of a suicide jump from an apartment in Queens, FBI agent Sean Reilly wonders why he's been called to the scene. Things soon become clear when he learns that the dead man is a Russian diplomat and the elderly couple who live there, Leo and Della Sokolov, have disappeared. What Reilly still doesn't understand is who would want to attack two old, and seemingly blameless, people in their own home. As the hunt for the missing couple escalates, it seems that it's not only the FBI who is looking for Leo. Another man, a Russian operative, is hot on Sokolov's tail. Now the race is on to find Leo and Della; figure out what is going on; and get to the bottom of a decades-old mystery with the power to kill. Meanwhile, Reilly is also fighting a personal battle. He has vowed to find the man responsible for attacking his four-year-old son, and he's about to discover that chasing a CIA ghost is nearly as an impossible and deadly task as stopping an elite Russian hitman.