Thea froze. Her heart hammered against her ribs so violently she calculated the acoustic probability of it giving away her position to the thermal-eye in the sky. She squeezed her eyes shut, visualizing the topographic maps of the Stone Ribs. She was in a natural fortress, but if those men came back with dogs or acoustic sensors, this fortress mathematically became a sarcophagus.
Whoo-whoo-whoo
The sound was perfect. A Great Horned Owl. To anyone else, it was just the wilderness speaking. To Thea, who had spent three seasons tracking avian migration patterns in this exact sector, the cadence was statistically anomalous. It was too rhythmic. Too deliberate.
It was Ben’s promise.
She moved. Her limbs were stiff, joints protesting the cold as she slid out of the fissure. She didn’t look back toward the cabin. She looked up, toward the high ridge where the air was thinner and the vents were fewer.
As she crested the first shelf of rock, a shadow detached itself from a cluster of mountain mahogany.
Thea nearly screamed, her hand flying to her mouth. She froze, her brain frantically processing the silhouette. It wasn’t Ben. The frame was too lean, the posture too fluid. But he wasn’t wearing the bulky tactical gear of the mercenaries, either.
Data point: Ben said he had a partner.
“Easy, Doc,” the shadow whispered, his voice barely a ghost of a sound as he stepped into the moonlight. “I’m Reef.” He caught her elbow, steadying her. “Grizzly’s leading them toward the canyon floor. We need to move while their eyes are on his heat signature.”
Grizzly. Reef.
Even in the grip of panic, her brain automatically categorized the military call signs, filtering them through her own area of expertise. Grizzly. Terrestrial biome. Apex predator. An accurate descriptor for Ben’s massive, protective presence. Reef. Aquatic biome. Submerged. Hidden ecosystems with sharp, lethal edges below the surface.
Looking at the cold, hyper-focused eyes of the stranger holding her arm, she decided the nomenclature was statistically accurate.
“He’s out there alone,” Thea whispered back, her voice trembling. “Reef, those men are moving in complete silence. They have thermal optics that make my university field-cameras look like toys.”
“He’s not alone,” Reef said. His eyes reflected the moonlight like a predator’s. “He’s got the mountain. And right now, the mountain is on our side. Come on. We have to reach the cave system before the drone circles back.”
They began to climb. Every step away from the valley floor felt like leaving a vital piece of her own operating system behind with the man in the t-shirt, running through the dark.
As they moved, Thea struggled with the pace. Reef didn’t use many words, which she appreciated, but the ones he did use were maddeningly open-ended.
You good? Almost there.
Her brain stalled, struggling to find the correct parameters for “good.” Physical integrity? Emotional stability? Baseline stamina? She couldn’t answer, so she focused instead on the way Reef moved. He was leaving a trail: a snapped branch with a specific twist, a kicked stone with its unweathered side facing up.
Data point: He is expecting rescue. He is marking a path for the others.
“Reef, wait,” she panted as they reached a plateau. She pulled the small, encrypted USB drive from her pocket. She needed to explain why it was safer with him. She needed to verbalize that her social processing delay made her a profound liability if interrogated.
But the words felt like an overflowing filing cabinet in her mind. She couldn’t find the top sheet.
“If we get separated,” she finally managed, forcing her voice into a clinical, detached rhythm to keep from crying, “you have to get this to the ranch. They’re using a high-frequency acoustic drill to bypass the granite cap. They’re going to cause a hydrothermal eruption.”
Reef paused, his hand on his sidearm.
She registered a flicker of something in his expression, grim understanding, perhaps, or the rapid calculation of this new, catastrophic risk.
“An eruption? Like a volcano?”
“Worse,” Thea said, finding sudden comfort in hard facts. “A steam explosion that will turn this entire valley into a pressure cooker. And they’re still drilling.”
Before Reef could respond, a low, rhythmic vibration hummed through the air. Thea’s head snapped up as she analyzed its frequency.
“The drone,” she whispered. “It’s changed its pitch. Terminal descent pattern.”
“What?” Reef asked, narrowing his eyes. He understood terminal descent, but he was surprised that she could tell just by the sound.
Thea struggled to translate the data into civilian terms. Terminal descent means it has a lock. Terminal descent means we have run out of ‘almost’.