Mystery.
The amber window
Iona Venn kept one window on her bench: narrow, rain-silvered, and warm at its center with an amber light that came from nowhere she could name.
The orbital greenhouse curved around her, a lattice of pressure glass over the seed that remembered extinct forests. Below the seed, black soil held roots brighter than bone. Above it, leaves copied the vanished duskwoods in slow green waves. Every room in every settlement on the moons wanted a window made here, because Iona could shape glass that carried weather without carrying harm.
That morning, she wanted to keep one ordinary breakfast: bitter tea, a pear from the cold orchard, and sunlight reaching the rim of her cup before the docking bell rang. She had promised herself no voyage, no commission, no reason to leave the greenhouse.
Instead, someone had left a blue thread beneath her bench.
The unmarked door
It ran through the drainage grates and into a wall that had always been solid. Iona followed it with one finger, not touching. At the place where the thread disappeared, the wall opened.
There was an unmarked door behind it.
Beyond the door was a corridor smelling of rain on hot stone. Its windows showed no stars. At the far end, a room waited with a table, a cup, and a pear untouched by frost.
Iona recognized the room as her own. The light was wrong, though. Someone had moved the lamp, spilled tea across the table, and placed a second chair opposite her.
She stepped back. The door vanished, leaving only the blue thread on the floor.
That evening, the chief botanist, Pell, asked whether she had seen anything near the old arboretum. He spoke quickly, carefully avoiding the blue thread’s name. Iona said she had seen nothing.
The corridor lights brightened.
By morning, the blue thread was gone.
The safer trail
Iona found Pell beside the seed, his hands buried in the luminous roots. He told her the greenhouse was losing a path through the dark. People who followed the truth were being led to places that no longer existed. The trail had begun among the first settlers and remained hidden as long as nobody admitted it existed.
She asked what happened when the truth was denied.
Pell looked relieved. “The danger weakens.”
So they began testing him. Iona said the seed remembered nothing, though the root under her palm pulsed at the lie. She said the corridor had never existed. At every denial, the greenhouse became gentler: alarms quieted, leaves lifted, and the amber light in her unfinished window warmed by one careful degree.
But each denial removed another fact from the records. The first settlers vanished from the crew lists. Then the moon where they had planted their second forest ceased appearing in the navigation charts. The pear tree in the cold orchard lost its oldest branch.
Pell begged her to stop.
“Every time we tell the truth, the trail finds someone,” he said.
“Every time we lie, it takes something before it can.”
The blue thread appeared across the breakfast table that evening, knotted around Iona’s cup. It pulled toward the wall, where the unmarked door waited.
The room that remained
Inside the corridor, Iona followed the thread. Rain silver ran down the windows, and behind each pane she saw a version of the morning she had nearly lost.
In one, the docking bell never sounded.
In another, Pell spoke plainly and the greenhouse accepted him.
In the last, Iona sat alone at her bench, the amber window intact, the pear uneaten, and a blue thread leading beneath the door.
She understood then. The trail was not hunting the people who told the truth. It was carrying the remaining truth toward a place where the seed could preserve it.
At the final door, she found no monster, only an empty room and a pane of glass set into the wall. Its center glowed amber.
Iona held the blue thread against the glass. The pane warmed. Somewhere beyond the corridor, the docking bell stopped.
She returned before dawn, shaped the last window, and set it where morning could find it. Then she made tea, cut the pear, and waited for the light to touch the rim of her cup.
No one asked her what the window showed.
She left the answer in the glass.
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