A shadow operative investigates mysterious attacks on United States diplomats and intelligence personnel around the world, only to uncover a plot far more dangerous than anyone could ever imagine in this white-knuckled thriller in the "action-packed" (Lisa Gardner, #1 New York Times bestselling author) Brian Rhome series.

Three NATO scientists are murdered in Europe.

Two more are assassinated in the United States.

They all share one thing in common: A decade before, they worked on a secret project developing weapons they believe are responsible for causing the sudden onset of a medical crisis ripping through the American diplomatic and intelligence communities?a mysterious and debilitating condition known as Havana Syndrome.

With these weapons on the loose in New York City, former CIA paramilitary operations officer Brian Rhome finds himself unravelling not only the truth behind the syndrome but caught in a plot of deception and deceit?a web with disastrous intent, one that could beckon global catastrophe.