Behind her, she could hear James and Garrett still struggling, their movements punctuated by harsh breathing and the metallic sound of something clattering against concrete. She couldn't spare attention for the fight—couldn't help James when every second counted toward Stacy Lang's survival.
"The red lines," Garrett called out, his voice strained but still carrying that unsettling calm. "Those feed the primary steam valves. But cutting them won't help—I've rigged a dead man's switch. Temperature drops too fast, the chamber seals permanently. She'll suffocate in there even if the heat doesn't kill her."
Isla's fingers froze over the wiring, horror washing through her. A dead man's switch meant Garrett had planned for intervention, had built in failsafes that would ensure his victim died regardless of rescue attempts. The sophistication was terrifying—this wasn't improvised violence but carefully engineered murder.
"Then I'll do it gradually," Isla said, forcing her voice to stay steady. She identified what looked like a flow regulator, a dial that had been deliberately cranked to maximum. "Reduce the steam pressure slowly enough that your switch doesn't trigger."
She began turning the dial counterclockwise, moving in tiny increments while watching a pressure gauge mounted above thejunction box. The needle didn't move immediately, the system sluggish to respond, and Isla had to fight the urge to simply wrench the dial to its minimum setting and pray the dead man's switch was a bluff.
"You're making a mistake," Garrett said, and Isla heard genuine distress in his voice now, as if her interference was causing him pain. "Stacy Lang's soul is wrong. I can see it—have been able to see it since the heat stroke four years ago damaged my brain in exactly the right way. She radiates cold while her body produces warmth. The disconnect marks her as fundamentally broken."
"You're insane," James's voice came from the darkness, ragged with exertion. "Heat stroke didn't give you visions—it caused neurological damage that you've built a delusion around."
"Is it delusion if I can prove it?" Garrett's tone carried an edge of desperation now. "I've identified seventeen people over the past four years whose heat signatures were wrong. Seventeen cold souls wearing human masks. And every one of them was cruel or corrupt or callous—their external behavior matched the internal wrongness I could perceive. That's not delusion. That's clarity."
The pressure gauge needle finally began to move, dropping from its dangerous red zone by tiny increments. Isla kept turning the dial, her entire focus on the gradual reduction that might cool the chamber without triggering whatever failsafe Garrett had installed.
"How many have you killed?" Isla asked, partly to keep Garrett talking, partly because she needed to understand the scope of what they were dealing with.
"Three," Garrett said, and something in his voice suggested pride rather than shame. "David Langford, whose cold soul wore a city uniform while he treated citizens with contempt. LindaGraves, whose social work credentials disguised the absolute zero of someone who viewed vulnerable families as problems rather than people. Robert Yamamoto, whose compassionate doctor façade barely concealed the chill of someone who'd lost all capacity for genuine human connection. It would have been four with Stacy Lang, whose healthcare administration title masked her fundamental coldness toward the sick and suffering she claimed to serve."
"You're describing people with personality flaws," James said, his voice tight. "Not some metaphysical corruption. People who were maybe not great at their jobs, who had issues with empathy or bedside manner. That's human variation, not evidence of defective souls."
"You can't see what I see," Garrett said, and now his voice carried something close to pity. "Your perception is limited to the visible spectrum, to behavior and evidence and the material reality you can measure. But I see deeper. I see the truth that exists beneath skin and performance and the lies people tell themselves about who they are."
The pressure gauge had dropped into the yellow zone now, still dangerous but no longer immediately lethal. Isla checked her watch—fourteen minutes since Garrett had said Stacy Lang entered the chamber. She'd be unconscious at minimum, possibly already suffering irreversible brain damage if her core temperature had climbed above 106 degrees.
"James," Isla called out. "I need you to find a way to open that chamber door. I don't care if you have to shoot off the lock—we need to get her out now."
She heard movement in the darkness, heard James saying something to Garrett she couldn't quite make out. Then the sharp crack of a gunshot, deafeningly loud in the enclosed space, followed by the screech of metal giving way.
Isla abandoned the junction box and ran toward the chamber door, her flashlight beam cutting through steam that had begun to vent from the damaged seal. James stood near the entrance, his weapon still raised, having apparently shot through the locking mechanism to force it open.
"Get back," Isla said, pulling off her already-sweat-soaked shirt to wrap around her hand. The chamber door would be scalding hot—touching it with bare skin would cause immediate burns. "Let me—"
But James was already pulling the door open, using his jacket sleeve as protection. A wall of heat billowed out, so intense that Isla stumbled backward, her lungs seizing as she tried to breathe air that felt like it was burning her from the inside out.
Through the wavering heat distortion, she could see a figure slumped on the chamber floor—Stacy Lang, unconscious or worse, her business attire soaked through with sweat, her skin flushed an alarming red that suggested dangerously elevated core temperature.
"We need to get her out," Isla managed, though speaking hurt her throat. "Now, before—"
She heard movement behind her and turned to find Garrett rushing toward them, his heat suit giving him protection that allowed him to move through temperatures that would incapacitate normal people within seconds. His weathered face was twisted with something between anguish and rage.
"You're ruining everything," he said, and his voice cracked with genuine pain. "She needs correction. Her soul is wrong. I can see it—you just have to trust what I see—"
Isla raised her weapon, but the heat was making her vision swim, making her grip uncertain. Before she could fire, James stepped between her and Garrett, his own weapon trained on the older man's chest.
"It's over," James said firmly. "Stop moving or I will shoot you."
For a moment, Garrett seemed to consider his options, his gray eyes moving between James's weapon and the chamber where Stacy Lang lay dying. Then something in his expression shifted—resignation settling over his features like a mask.
"You can't see it," he said quietly, his hands rising slowly in surrender. "You'll never be able to see it. But that doesn't make it less real. The cold souls walk among you, Agent Rivers. They always have. I was just trying to correct the errors, to remove the defective components before they caused more damage."
"Save it for your lawyer," Isla said, holstering her weapon and pushing past him toward the chamber. The heat was still oppressive, but no longer immediately lethal thanks to her adjustments to the steam pressure. She dropped to her knees beside Stacy Lang, checking for a pulse that was there but racing dangerously fast.
"She's alive," Isla called out.
Behind her, she heard the commotion of backup finally arriving—heavy footsteps on the stairs, voices calling out tactical positions, the organized chaos of law enforcement flooding into the tunnels. Morrison's voice rose above the others, coordinating the response with the efficiency of decades of experience.
