John Dempsey's life - as an elite Tier One Navy SEAL named Jack Kemper - is over. A devastating terrorist action catapults him from a world of moral certainty and decisive orders into the shadowy realm of espionage, where ambiguity is the only rule. His new mission: hunt down those responsible for the greatest tragedy in the history of the US Special Ops and bring them to justice.

TOP GUN instructor Colt Bancroft has just catapulted off the USS Abraham Lincoln, his F-35C Joint Strike Fighter trailing blue and yellow flame as he climbs into the night sky off the California coast. When he is sent to investigate a series of mysterious lights floating dangerously close to his aircraft carrier, disaster strikes. His jet becomes unresponsive as it rolls inverted and enters a nosedive aimed right at the aircraft carrier’s unsuspecting escort cruiser… What follows is a tale of heroism and betrayal, spycraft and suspense, and aerial combat against an unexpected adversary.

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.

Navy SEAL Keith “Chunk” Redman has been one of the military’s top doorkickers since the day he pinned on his trident: loyal, single-minded, lethal. Tasked to lead a new, covert team of Tier One SEALs—the most elite special operators in the world—Chunk can no longer simply rely on the status quo. To safeguard America, he needs help to stay a step ahead of its adversaries.

In the serene backdrop of New Hampshire's Franconia Notch, Micah Taylor, an ex-Army Ranger, finds solace with his loyal golden retriever, Grover. Their peaceful existence is suddenly shattered when a first date with his old friend, Jess Bender, takes an unexpected turn. Bright lights descend from the sky, leading them into the dark woods and a shocking discovery: the Kylonari, an advanced alien species with a special connection to Micah, here on a quest to find "The Lost Tribe"—a colony that vanished millennia ago.