Alexander Leonidovich Ryzhkov, a Russian oligarch and former general in the Russian Military Intelligence Directorate (GRU), runs a covert operation in the Middle East, supplying a Saudi terrorist mastermind with four Russian nuclear suitcase bombs and a list of two US cities to target. A CIA operation thwarts the planned attack and kills many Russian agents, including his brother Sergei Ryzhkov. The oligarch is out for revenge.

Ryzhkov approaches a former CIA station chief and offers him money in exchange for the CIA operatives' names. Armed with this intelligence, he launched his vendetta, targeting the former CIA operatives Mark Ericksen, now CEO of EyeD4 Systems, his fiancé Kate McDonald, a banking consultant, and Lars Wahlberg, OO of EyeD4 Systems. Ryzhkov's asset also revealed Ericksen, a former Navy SEAL Team-Six officer, killed several Russian agents while rescuing McDonald during the CIA operation.

Can Ericksen and his former operatives avoid the assassins' poisoning efforts and turn around the deadly game of hunter and prey?