Logan Alexander is at a crossroads. Forced out of the SEALS because of a wartime injury, he and a team of fellow Special Force operators have successfully taken out an Iranian terrorist training camp off the coast of Iran. But now, Unit 400, a group of Iranian assassins working for the Qods Force is seeking revenge. They are on the move, in Europe, South America and in the U.S. It will take all of Logan's wits and skill to triumph over the deadly killers.