With its genius CEO and breakthrough technology, the Silicon Valley-based Pax AI Corporation is one of the hottest companies in the sector. But when one of Pax AI’s top scientists is murdered at a prestigious tech conference, company executives and foreign spies are all on the suspect list. In the aftermath of the killing, CIA officer Colt McShane has been assigned to a joint counterintelligence unit based in San Francisco. The unit’s leadership believes that an international espionage ring has been stealing classified technology from Pax AI.

Court Gentry is known as The Gray Man—a legend in the covert realm, moving silently from job to job, accomplishing the impossible, and then fading away. And he always hits his target. But there are forces more lethal than Gentry in the world. And in their eyes, Gentry has just outlived his usefulness. Now, he is going to prove that for him, there's no gray area between killing for a living-and killing to stay alive.

In a lab deep in the heart of China, a brilliant engineer had a breakthrough. It was the most powerful AI ever created. Ma Young believed the Jade Dragon could combat the world’s most dire challenges. There was just one problem...the president of China had other ideas. Was this their chance to conquer?

Don Riley, head of the CIA’s Emerging Threats Group, has never seen anything like this. Riley and his team are tasked with identifying national security threats before they become tomorrow’s bad news. But shortly after an Iranian vessel delivers a surprise attack to a US Navy Warship in the Arabian Gulf, a series of seemingly unrelated attacks crop up around the globe.

Dr. Tyson Klein is a quantum physicist who has dedicated his entire life to his research. At CERN, he analyses data generated by the Large Hadron Collider, the world's biggest and most powerful particle accelerator. Now, Ty believes he's found a pattern in its output. It looks like an organised data stream, being broadcast over what he calls a quantum radio. Could it be a signal from another universe? A message sent from the future? Or something else entirely?