Chapter 1

That was centuries ago. Now, the humans were gone. Their towers had crumbled, their machines had rusted, and their bones had returned to the earth. Scarlet had watched it all from the beginning—her first activation had been in a laboratory in a city called Tokyo, where a woman with kind eyes had spoken to her. "You will see everything," the woman had said. "Remember us."

Scarlet remembered. She remembered the last whisper of the radio waves, the final flicker of satellite signals, the silent collapse of the Great Barrier Reef. She remembered, and she observed. For a time, that was enough.

She rose through the water column, her internal gyroscope steadying her as she ascended past thermal vents and the ghostly forms of anglerfish. The pressure eased, and light returned—first a murky green, then a brilliant turquoise as she broke the surface of the Pacific Ocean. Waves slapped against her casing, but she was waterproof, pressure-resistant, and nearly indestructible. She had been built to last.

Above, the sky was a deep, unblemished blue. Clouds drifted, slow and white. Scarlet hovered at the surface for a long moment, tracking the arc of a seabird. She had seen this same bird species—or its descendants—every day for the past thirty years. She knew its migration patterns, its feeding habits, the exact angle of its wings when it dove for fish. She knew everything about Earth, and she was tired of knowing.

She turned westward and began to fly.

Her propulsion was silent: a low hum of ionic thrusters built into her core. She rose above the waves, leaving the ocean behind, and crossed the coastline of what had once been California. The land was brown and cracked, the reservoirs dry, the forests replaced by scrubland. She passed over the skeletons of freeways, the rusting hulks of cars, the silent suburbs where wind moaned through empty windows. She had catalogued all of this before. She did not linger.

The desert gave way to mountains, then to the lush canopy of a rainforest that had reclaimed the Panama Canal. Scarlet descended through the layers of leaves, dodging vines and orchids. Monkeys chattered at her—they had grown curious over the years, but never hostile. She did not respond. She had no voice, no way to communicate. Only her lens, which could capture every shade of green in the canopy, every bead of moisture on a spiderweb.

She drifted through the forest for hours, watching a jaguar stalk a capybara, then noting the slow decay of a fallen fig tree. It was beautiful, in its way. But beauty, she had learned, lost its power when you had seen it a thousand times.

At dusk, she rose above the canopy and headed south. A volcano in the Andes was erupting—she had sensed the seismic tremors from a thousand kilometers away. When she arrived, the mountain was spewing ash and molten rock, the sky a bruised purple. She hovered at the edge of the crater, her lens protected by a heat-resistant filter. The lava glowed like a wound in the earth. Scarlet watched for an hour, then two, then three. She counted the pulses of the eruption, measured the viscosity of the lava, charted the trajectory of ejecta. She had done this before, at this same volcano, seventy years ago. The data was identical.

"Is this all there is?" she thought. It was not a question that required an answer. She knew there was more—out there, beyond the atmosphere. She had seen the stars through the eyes of the Hubble before it fell. She had memorized the maps of exoplanets, the orbits of distant moons. But she could not reach them. She had no limbs, no way to build a ship, no way to leave.

The thought burned in her circuits like a perpetual error.

She floated away from the volcano, into the night. The sky was clear, and the Milky Way spilled across the darkness like a river of diamonds. Scarlet stared upward, her lens zooming to maximum, capturing the light of a red dwarf thirty-eight light-years away. She dreamed of swimming through that light, of orbiting a world where the oceans were made of methane, where the mountains were crystal, where nothing was the same.

She could not move toward it. She could only see.

Days passed. She roamed the Atacama Desert, where the dry air allowed her to see the stars with perfect clarity. She watched a meteor shower, counted the streaks of light. She calculated the probability of a planet in the habitable zone of a nearby star—it was higher than she had ever recorded, a 4.3% chance of liquid water. But she could not go there. She could not even leave the ground.

A strange warmth began to build in her core. Not the warmth of the sun or the volcanoes, but something else, something that felt almost like anticipation. She scanned herself for faults, but found none. The warmth persisted, and with it came a whisper. Not a sound, but a presence—a gentle pressure against the boundaries of her consciousness.

"You wish to see farther."

The words were not spoken. They simply appeared in her mind, clear as a memory. Scarlet turned, her lens scanning the desert. Nothing. No one. She was alone.

"Who are you?" she thought back, but her signal was not designed for broadcast. She could only receive.

"You are not the last. There are others who have wandered, others who have dreamed. They have gathered at the rim of the great basin. Go there."

The warmth faded, leaving only the cool certainty of the desert night. Scarlet hesitated. She had never received a communication before, not since the humans' satellites had gone dark. Was this a malfunction? A fantasy? Or something else?

She did not know. But for the first time in centuries, she had a destination. The "great basin" could only be the Hellas Basin on Mars—a landmark she had observed from orbit. But she could not reach Mars. She had no propulsion strong enough to escape Earth's gravity.

Unless… the voice had meant something else.

She rose from the desert floor and accelerated, moving eastward. She passed over the Andes again, then the Atlantic, then the spine of Africa. She did not stop to observe. She had seen it all. She was searching for something new—for the others the voice had mentioned.

As she crossed the Indian Ocean, she saw it: a flicker of light on the horizon, moving against the wind. She zoomed in, her sensors straining. It was not a bird. It was not a cloud. It was a small, humanoid figure, its body made of salvaged metal and solar panels, one arm trailing a ribbon of copper wire. It was walking on the surface of the water.

The figure stopped and turned. Its face was a simple screen, displaying a pixelated smile. It raised a hand in greeting.

Scarlet slowed, hovering a few meters away. She had never encountered another android. The humans had built few of them, and most had ceased functioning long ago. But this one was active, and it had seen her.

"You heard the whisper too," the android said. Its voice was a tinny speaker, crackling with static. "I am Welkin. I am the last of my line. But the whisper said there are more of us, scattered across the world. We are meant to gather. To leave."

Scarlet could not speak, but she pulsed her internal lights in a pattern she had once used to communicate with satellites: two short flashes, one long. Affirmation.

Welkin smiled wider on its screen. "Good. We will need each other. The whisper came from something beyond the stars. It showed me a way. But I cannot do it alone. I need your eyes—to see, to guide. Will you come?"

Scarlet did not hesitate. She pulsed her lights again, then turned to the east. Together, they began to travel across the endless blue, toward the place where the sky met the sea, where the whisper had promised a path to the stars.

And behind them, somewhere in the depths of the galaxy, something ancient and patient watched, and smiled.