Following the murder of his fiancée, Mitch Rapp trains under the instruction of Cold War veteran Stan Hurley. The pair then is enlisted to investigate a wave of apparently random attacks on military and civilian targets.

The secret US abduction of a suspected terrorist from his Middle East homeland leads to a wave of terrorist attacks in New York. An FBI senior agent and his team attempt to locate and decommission the enemy cells, but must also deal with an Army General gone rogue and a female CIA agent of uncertain loyalties.

Nathan Algren is an American hired to instruct the Japanese army in the ways of modern warfare, which finds him learning to respect the samurai and the honorable principles that rule them. Pressed to destroy the samurai's way of life in the name of modernization and open trade, Algren decides to become an ultimate warrior himself and to fight for their right to exist.