Three teenagers sneak into an abandoned observatory and find a hidden circle of stones that opens into a world where the rules of reality begin to break.
For two years, the old observatory on the hill had stood empty, or so the adults said. Its windows were dark, its brick walls split by ivy, and the locked door was supposed to keep everyone out. But Mira, David, and Natan had never believed in places that simply stayed dead.
That afternoon the wind came hard off the fields, stripping leaves from the trees as they climbed the hill. Low clouds dragged across the sky, and the observatory loomed ahead of them, half hidden by rustling poplars. Mira lifted her phone and switched on the torch.
"Are you sure this is a good idea?" David asked. He kept glancing back down the path, as if the hill might suddenly change its mind and throw them off it. "You heard what Paul said. About the lights on the walls."
Mira gave him a look. "Paul says everything is haunted. Move."
Natan reached the door first. The rusted handle protested, then gave way with a shriek that seemed far too loud in the empty grounds. A cold smell of dust and wet stone rolled out to meet them. Inside, the air was stale and heavy, and their footsteps sounded wrong, as if the building was listening.
The main hall stretched ahead beneath a ceiling split by long cracks. An old planetarium stood in the centre, draped in cobwebs. The last light of day fell through a broken pane and turned the dust in the air to silver.
Then David stopped so suddenly that Mira nearly bumped into him.
"There," he whispered.
By the wall, partly hidden in shadow, a circle of worn stones was set into the floor. They were different colours, faded with age, but arranged with a precision that made Mira's skin prickle. It did not look like part of the building. It looked placed.
She crouched before it, frowning. One stone was warm under her fingertips.
The observatory flashed blue.
Light streaked across the walls in sharp, unnatural lines. The floor shuddered beneath her knee. David cursed under his breath and grabbed Natan's sleeve. The circle began to glow, brighter and brighter, until the colours in the stones seemed to be moving.
"Mira," David said, his voice thin with panic.
She tried to pull back, but a strange tingling climbed up her arm, quick as static and cold as ice. The stone was no longer still. The air above the circle rippled, bending the room behind it like water in a storm. For one stunned second, Mira saw something beyond the shimmer: a landscape lit in impossible colours, trees twisted like spirals, and dark shapes moving between them.
A voice came from somewhere far away, distorted and deep, as if spoken through walls of glass.
"Guardians... you have crossed the border."
The floor lurched.
The observatory vanished into darkness, and the world seemed to tear apart around them.
When Mira opened her eyes, she was lying on soft blue moss. The forest around her glowed faintly, alive with insects that sparkled like fragments of a broken star. David was coughing beside her. Natan sat up too quickly and stared at the trees as if they might lunge at him.
"Where are we?" he managed.
Before anyone could answer, something moved in the undergrowth.
A figure stepped out between the trees. Tall. Still. Its silver eyes caught the strange light and held it.
"You have very little time," it whispered. "The circle is closing."