When an exiled Iranian scientist is assassinated in Washington, DC, the former FBI counterintelligence agent and ex-SEAL are pulled back into the world of clandestine ops—and the fate of the entire East Coast is at stake. Joining ranks with a heralded Mossad agent, Mayberry and Garrett pursue a skilled international killer hired to murder a legendary Israeli spymaster. Their pursuit draws them into an international conspiracy led by a power-hungry Russian oligarch intent on destroying Washington, DC, and the Navy’s most important Atlantic base. The oligarch plots to unleash a nuclear onslaught first devised by the KGB but shelved by Kremlin leaders during the Cold War. On top of this, Iran’s sudden offer to help the United States raises suspicions about its possible role in a global shakedown.