10. Father's Eyes

The smuggler's trail followed a dry riverbed that twisted upward through the foothills like a scar left by some ancient flood. In the moonlight, the stones were pale as bones, and the cliffs on either side rose in layers of shadow that made Simo think of the cutaway diagram in Yuchi's painting—the earth peeled back to reveal what lay beneath.

They had been walking for four hours, stopping only when Xuanjing's aged legs could no longer carry him. The old monk refused to complain, but his breath came in ragged gasps, and his hands trembled on the staff he had cut from a cypress branch. Shi Yan walked ahead, his knife drawn, his eyes scanning the darkness for movement. Simo brought up the rear, carrying Yuchi's painting in a bamboo tube slung across his back.

No one spoke. The silence of the mountains was different from the silence of the temple—heavier, older, as though the rocks themselves were holding their breath. Simo found himself listening for sounds that were not there: the clack of looms in the weaving hall, the scrape of the grinding stone, the muffled screams that had been buried so deep in the earth that even the stars could not hear them.

He thought of his father, somewhere on the road south, his mother clutching the cart rail, the servants driving the donkey forward through the dust. He had sent them away without telling them the full truth, and now he wondered if he would ever see them again. The thought settled into his chest like a stone dropped into still water, the ripples spreading outward until they touched everything.

"We should rest," Shi Yan said, stopping beside a twisted juniper that grew from a crack in the cliff. "The old monk cannot continue at this pace, and we will need our strength when we reach the mine."

Xuanjing lowered himself onto a flat rock, his chest heaving. "Do not... slow yourselves... for me. I have lived... long enough."

"You have lived long enough to see this finished," Simo said. "That is why you are here. Not to climb mountains, but to witness."

The old monk smiled, a thin curve of lips in the moonlight. "You sound like Yuchi. He always said the witness was as important as the act. A crime unseen is a crime that never happened. A truth untold is a truth that never existed."

"Then tell me more about him. About the man whose truth we are chasing."

Xuanjing leaned back against the cliff and closed his eyes. For a moment, Simo thought he had fallen asleep. Then the old monk began to speak, his voice dry as the riverbed stones, and the story he told was not the one Simo had expected.

Yuchi Danqing had come to Gaochang from Khotan twenty years ago, a young painter with hands so skilled they seemed to move independently of his body. He had trained in the Samarkand workshops, where Persian and Chinese and Indian traditions mingled like inks on a wet palette, and he had developed a style that was entirely his own. His specialty was red. No one could match his vermilion, his cinnabar, his crimson. Collectors in Chang'an paid fortunes for paintings that used Yuchi's red, and Yuchi guarded the secret of his pigment with the paranoia of an alchemist.

The secret, he told Xuanjing years later, was a fungus he had discovered in a cave above the tree line. It grew in absolute darkness, feeding on the heat of the earth, spreading through the rock like veins through flesh. When it was ground and mixed with oil, it produced a red so vivid it seemed to glow. But the fungus died quickly outside its cave. The color faded within days. Yuchi spent five years trying to solve this problem, and in the end, he discovered that the only thing that could preserve the fungus was human blood.

"Not just any blood," Xuanjing said, his voice barely above a whisper. "The blood had to be taken from a living body. The fear, the pain, the struggle—they released something into the blood that the fungus needed. Yuchi called it the breath of terror. He said it was the most precious substance in the world, and the most terrible."

Yuchi had made this discovery by accident, testing different preservatives on samples of the fungus. Animal blood did not work. Blood from corpses did not work. Only blood drawn from a living, terrified human being would sustain the color. He had realized, with a horror that never left him, that he had created something monstrous. He had wanted to destroy the fungus, to seal the cave and forget what he had found. But by then, the network had already learned of his discovery.

"They came to him at night," Xuanjing continued. "Your master, the Ghost Brush. A merchant named Kang. A minor official from the prefecture. They told Yuchi that they had investors in Chang'an who would pay any price for paintings made with Crimson Lake. They told him that the blood was a small price to pay for immortality. They told him that if he refused to share his discovery, they would take it from him."

Yuchi had refused. He had tried to flee. The network caught him at the Hami oasis, dragged him back to Gaochang, and imprisoned him in the cellar of the weaving hall. For three months, they kept him alive, forcing him to train their workers in the extraction process. And when he could teach them no more, they buried him in the pit and used his blood to make the first batch of commercial Crimson Lake.

"Your master painted it," Xuanjing said, looking at Simo. "He was there. He watched Yuchi die. And then he took his brush and painted the screaming figure, the bound wrists, the glinting blade. He painted it on the scroll that would eventually reach your father's counting room, and he painted over it with a peaceful landscape, and he carried the guilt of it for the rest of his life."

Simo felt the stone in his chest grow heavier. His master had been a murderer. His master had also been a man who spent ten years training an apprentice to uncover his crime. The two truths sat side by side in his mind, irreconcilable and inseparable.

"Why did he choose me?" Simo asked. "Of all the students he could have taught, why me?"

"Because you were innocent," Xuanjing said. "Because you had not been touched by the darkness. He wanted someone pure to finish what he could not. Someone who would see the hidden layer and feel not guilt but outrage. Someone who would act."

Simo thought of the empty pavilion in the scroll, the figure that had vanished in the night. His master had painted a witness into the landscape, and then erased it, and then waited for another witness to take its place. Simo was that witness. He had been chosen for it, shaped for it, led toward it by a chain of events that stretched back fifteen years.

"We should keep moving," Shi Yan said. "The sky is beginning to lighten. Li Yao's men could be on the trail behind us."

They rose and continued up the dry riverbed. The path grew steeper, the stones looser, the air thinner. The junipers gave way to bare rock and patches of lichen that glowed pale green in the pre-dawn light. Above them, the peaks of the Heavenly Mountains were catching the first rays of the sun, their snowcaps blazing pink and gold against a sky that was still deep purple in the west.

And then the riverbed ended, and before them rose a wall of stone.

It was not a natural wall. The stones had been fitted together, chiseled and stacked by human hands, sealed with mortar that had cracked and crumbled with age. A single opening pierced the center of the wall, a doorway that led into darkness. Above the doorway, carved into the lintel, was a symbol that Simo recognized.

A cicada, its wings spread, carved by a hand that had been dead for fifteen years.

"This is it," Xuanjing said. "Yuchi's mine. The source of the fungus."

Shi Yan approached the doorway cautiously, his knife raised. He peered into the darkness and then stepped back, his face pale. "There is a light inside. A red light. It is coming from deep within the cave."

Simo unpacked Yuchi's painting from the bamboo tube and unrolled it in the growing daylight. The diagram glowed, the vein of red pigment seeming to pulse against the silk. He compared the landmarks—the cliff face, the doorway, the carved cicada—to the map. Everything matched.

"Yuchi built this wall," he said. "He sealed the cave before he died. He was trying to bury the fungus, to keep anyone from ever finding it again."

"But the network found it anyway," Shi Yan said. "Li Yao has been mining it for years. The pigment cakes in the workshop—they all came from here."

"Not from here," Xuanjing said quietly. "From somewhere else. Look at the diagram. Yuchi's map shows a single vein of fungus, running through the mountain. But there is a second mark, here, at the edge." He pointed to a small symbol that Simo had overlooked, a tiny spiral drawn in the lower corner of the painting. "This is the symbol for a branch. A secondary deposit. Yuchi found more than one cave. He mapped them all. And this one—" He touched the cicada above the doorway. "This one he sealed himself."

Simo rolled up the painting and returned it to the bamboo tube. "Then Li Yao has been mining the other cave. The branch. He does not know about this one."

"Or he does, and he has been saving it. A reserve. A secret source that even his workers do not know about."

"Either way, we need to destroy it. The fungus in this cave, and the fungus in Li Yao's workshop. Both must be burned."

He stepped toward the doorway, but Shi Yan caught his arm. "Wait. If the fungus feeds on fear, on pain—what will it do when we enter? Yuchi built this wall for a reason. He was afraid of what was inside."

Simo looked into the darkness of the cave, at the faint red glow pulsing from its depths like a heartbeat. He thought of the victims in the pit, their terror extracted and fed to the fungus, their blood preserving its color. The fungus was alive. It had been alive for centuries, growing in the darkness beneath the mountain, and it had learned to hunger.

"We will not give it what it wants," Simo said. "We are not afraid."

It was a lie, and he knew it. He was terrified. But the terror was not for himself—it was for his father, his mother, the forty-seven names in the ledger, the countless others whose blood had been spilled to feed an appetite that could never be satisfied. The terror was a fuel, and he would burn it until there was nothing left.

They lit torches from the embers of a small fire that Shi Yan built in the shelter of the cliff, and then, one by one, they stepped through the doorway and into the darkness.

The cave was larger than Simo had expected. The ceiling rose high overhead, lost in shadow, and the walls curved away into chambers and passages that branched like the veins in Yuchi's diagram. The air was warm and damp, thick with a smell that was both sweet and metallic—the smell of blood and earth and something else, something alive. The floor was uneven, littered with fallen stones and the bones of small animals that had wandered in and never found their way out.

And everywhere, on every surface, the red glow pulsed.

It was the fungus. It grew in sheets and tendrils and clusters, covering the walls like a living carpet, its color shifting from deep crimson to pale pink as the torchlight moved across it. In places, it had formed structures that looked almost like organs—bulbous sacs that swelled and contracted with a rhythm that was not quite breathing, thin membranes that vibrated as though responding to some unheard sound. The entire cave was alive, a single vast organism that had been growing here since before the first human set foot in the mountains.

Xuanjing made a sound that was half gasp and half prayer. "Yuchi told me it was beautiful. I did not believe him."

"Beautiful and terrible," Shi Yan said. "Like everything the network creates."

Simo knelt beside a patch of the fungus and examined it closely. The surface was smooth and slightly warm, like living skin. Tiny veins ran through it, carrying a fluid that glowed faintly red. When he touched it with the tip of his brush, the fungus recoiled, pulling back from the contact like a sea anemone closing its tentacles.

"It feels pain," he said. "Or something like it. It responds to touch."

"Then it will respond to fire," Shi Yan said. He raised his torch and pressed it against the nearest sheet of fungus.

The effect was immediate and horrifying. The fungus shrieked—there was no other word for it—a high, thin sound that seemed to come from everywhere at once. The sheet blackened and curled and fell away from the wall, and the red fluid in its veins boiled and hissed. For a moment, Simo felt a surge of triumph. They could destroy it. They could burn it all.

And then the cave responded.

From the deeper chambers, from the passages that led into the heart of the mountain, came an answering sound. It was deeper than the shriek, lower and more resonant, like the groan of a living throat. The red glow intensified, pulsing faster, brighter. The bulbous sacs began to swell, their membranes stretching thin, and Simo saw shapes moving inside them—shapes that were not quite human, not quite animal, not quite anything he had ever seen.

"We need to go," Shi Yan said. "Now."

"The fire—"

"Will spread on its own. Look."

The flames from Shi Yan's torch had caught on the dry edges of the burned fungus, and now they were spreading across the wall in an expanding ring of orange and gold. The fungus screamed as it burned, and the deeper voice answered, louder now, shaking the floor beneath their feet.

They ran. The cave collapsed behind them, chamber by chamber, the ceiling cracking and falling in showers of stone and dust. The red glow flickered and dimmed and finally went dark. The screams faded into the roar of collapsing rock.

They burst through the doorway and into the dawn, and behind them, the wall that Yuchi Danqing had built fifteen years ago crumbled and fell, sealing the cave forever.

Shi Yan stood bent over, his hands on his knees, gasping for breath. Xuanjing had sunk to the ground, his face streaked with tears. Simo looked back at the ruined entrance, at the pile of stones that now covered the doorway, at the thin plume of smoke rising into the morning sky.

"It is done," he said. "This source, at least. But Li Yao's workshop—the other cave—is still active. The fungus there is still alive."

"Then we go back," Shi Yan said. "We finish it."

Simo nodded. But as he turned to begin the descent, he saw something that made his blood freeze.

On the trail below them, climbing steadily up the dry riverbed, were a dozen men. They wore the leather aprons of Li Yao's workers, and they carried swords and torches and coils of rope. At their head, walking with the calm, deliberate stride of a man who had never been denied anything, was Li Yao himself.

He looked up and met Simo's eyes across the distance, and his lips curved into a smile that did not reach his eyes.

"There is no path down," Xuanjing said, his voice steady despite the terror in his face. "The riverbed is the only way. We are trapped."

"No," Simo said. "There is another way. Yuchi's diagram showed a second entrance—the branch cave, the one Li Yao has been mining. If we can find it before they reach us, we can go through the mountain and come out on the other side."

"That will take us directly into Li Yao's workshop," Shi Yan said.

"Yes. And that is exactly where we need to be."

He turned and began to climb, not down toward the men who were coming to kill them, but up, toward the snow line and the hidden entrance that Yuchi Danqing had mapped fifteen years ago. Behind him, the fire inside the mountain continued to burn, its light flickering through the cracks in the rubble, its smoke rising in a thin column that could be seen for miles.

And below, Li Yao and his men continued their slow, patient ascent, knowing that the mountain had only one way down, and that their prey would eventually have to face them or die in the cold.

But the mountain had more ways than Li Yao knew. Yuchi had mapped them all. And Simo, the copyist who had spent his life reproducing the works of others, was finally creating something of his own.

A path. A plan. A way to burn the darkness from the inside out.