Three friends on a giant orbital station uncover a strange symbol, a hidden chamber, and a glowing secret that begins counting down to something unknown.
Zosia tugged at the stiff collar of her suit and pressed her forehead to the panoramic window of the Gaia orbital station. Below her, Earth floated like a bright blue marble, wrapped in white clouds and silver sunlight. Above and around her, the station stretched farther than she could take in, with long corridors, sealed hatches, and shadowy corners that seemed to wait for someone brave enough to explore them.
Zosia, her younger brother Nikolai, and their friend Amir had spent the summer in the Space Explorers programme, and every day brought something new. They learned how to steer a repair droid through tight maintenance shafts, how to tend vegetables in zero gravity, and how to spot tiny meteor scars in the station’s outer plating. It should have been the adventure of a lifetime.
Then the station began to feel wrong.
At night, when the lights dimmed and everyone was meant to be asleep, faint sounds drifted through the walls, like whispers carried through metal pipes. Doors in the technical section opened on their own, then shut again with a soft click. By morning, the strange noises had stopped, but the air seemed to keep their secret.
That morning, Nikolai called the others over in a fierce whisper. He had found a mark carved into the wall beside their cabin: a sharp symbol that looked part constellation, part machine code. It had been cut deep into the metal, as if someone wanted it to last. Zosia took one picture. Amir stared at it for a long moment, then began comparing it with codes on his tablet, his eyes bright with excitement.
That night, the three of them slipped from their bunks and crept down the dim corridor. The door to the technical section stood unlocked. Inside, the floor hummed beneath their shoes. A low vibration pulsed through the room, growing stronger with every step.
Then they saw it.
In the center of the chamber hovered a glowing sphere, no bigger than a melon, wrapped in spinning numbers and thin lines of light. It pulsed once, twice, like a heartbeat made of electricity. The children froze.
A crackle of static burst from the sphere, and a voice whispered through the room: "Twenty-four hours left until activation..."