He looked down at the flag in his lap, then up at the dog, and his mouth moved like he was saying something I couldn't hear.

A human being cannot catch an aircraft. But an eight-year-old German Shepherd bred from the purest working lines of the Bavarian border patrol, running with the ghost of his handler at his back, is not bound by normal limitations.

Rex crossed the final fifty yards of open tarmac in less than four seconds, cutting diagonally across the rotor wash that was flattening the tall grass around the airfield like matchsticks.

The helicopter’s skids were three feet off the ground. Then four feet.

Rex leaped.

It was an impossible leap—a desperate, soaring trajectory that carried him clean through the violent air currents beneath the spinning blades. His front paws caught the lower tubular step of the helicopter's right landing skid. His claws scrambled for purchase against the wet aluminum, his hind legs dangling over empty space.

Campbell saw him.

The look of supreme arrogance on Campbell’s face dissolved into absolute, hysterical horror. "Shoot it!" Campbell screamed into his headset, kicking frantically at the skid with his heavy combat boots. "Get it off the skid! Shake the bird!"

The helicopter banked violently to the right, the pilot trying to throw the extra weight off the gear before climbing over the tree line.

Rex lost his grip on the step.

My heart stopped. "REX!" I screamed, stumbling forward onto the open runway, my hand clutching my bleeding shoulder.

Rex didn't fall. As his paws slipped from the slick metal of the skid, his jaws snapped shut around the thick nylon cargo strap hanging from the open cabin floor—the very strap Campbell had been holding moments before.

The dog hung suspended beneath the fuselage, seventy pounds of pure willpower swinging through the driving rain as the helicopter cleared the twelve-foot perimeter fence of the compound.

Inside the cabin, Campbell drew a compact backup revolver from his ankle holster with his left hand, leaning dangerously far out into the hurricane of the rotor wash to aim straight down at Rex’s head.

"Die, you miserable cur!" Campbell shrieked over the turbine roar.

From the tree line behind the tarmac, the high-pitch wail of Harold’s modified wheelchair motor suddenly ripped through the night.

Harold had bypassed the governor on the chair's industrial batteries, driving the heavy steel machine straight off the concrete loading dock and down the access ramp onto the runway at twenty miles per hour. Bolted to the lap tray of his wheelchair was the long-range directional telemetry antenna he had pulled from the bunker's communications console.

"Donald! The transmitter!" Harold bellowed through a handheld megaphone, pointing the heavy dish antenna directly at the climbing helicopter. "The Judas frequency! Thomas didn't just alter the dog's failsafe—he left an open carrier on the master transponder!"

"What does that mean?!" I shouted, running alongside Harold’s speeding chair.

"It means every Chimera unit within five miles has a target lock on the transponder signal inside Campbell’s helicopter!" Harold roared, his eyes blazing with fierce, vengeful light. "Campbell thought he was calling his hounds to protect him! He doesn't know Thomas routed the master locator beacon to his private bird!"

Harold threw a toggle switch on the antenna base.

A high-frequency pulse—so intense that it made the fillings in my teeth ache and turned the rain mist into shimmering white rings—shot upward from the parabolic dish, striking the belly of the rising Sikorsky.

Inside the helicopter's cockpit, the master avionics console lit up with dozens of flashing red warning lights. The transponder didn't fail; it shifted frequencies, broadcasting a piercing, continuous acoustic beacon across every emergency channel on the Appalachian ridge.

And down in the dark woods surrounding the airfield, the shadows began to move.

The forty Chimera dogs that had escaped the bunker's lower spillway weren't running into the valley. They were turning.

They burst from the tree line like a wave of gray water, their milky, blinded eyes locked onto the acoustic beacon radiating from the helicopter hovering twenty feet above the runway. They weren't an army anymore. They were a swarm, completely enslaved to the frequency Campbell had spent his entire life perfecting.