Three friends break into an abandoned lighthouse on a cliff and find a coded diary that points to a secret someone still wants buried.
Cliff Valley School had always felt too small for Victor, as if every corridor, timetable, and familiar face had been arranged to keep him from going anywhere interesting. So when the summer holidays stretched on and boredom turned sharp, he made the kind of suggestion that could either become a stupid memory or the start of something dangerous.
Maja was the first to say yes. She never wasted words, but she loved a puzzle almost as much as she loved proving everyone else wrong. Tobias, who treated every abandoned building like the opening chapter of a novel, agreed before Victor had even finished explaining. By late afternoon, the three of them were climbing the rocky promontory toward the old lighthouse at the edge of the bay.
It stood above the sea like a warning no one had bothered to take down. Salt had eaten at the stone. Ivy had crawled halfway up the walls. Rust-red plaques were bolted beside the path, their letters faded by weather and neglect. Local stories had turned the place into a half-joke, half-threat: a keeper who vanished, a light that burned after it should have gone dark, sailors who claimed the beam had shown them the way home from ships that never reached harbour.
The sea was calm that day, almost unnervingly so. No waves crashed hard enough to drown out their footsteps. No gulls cried overhead. Even the wind seemed to hesitate.
Maja used her phone torch to pick out the broken steps leading to the entrance. Tobias walked backwards for a few metres so he could sketch the building in his notebook before they reached it. Victor said nothing. The closer he got, the more the lighthouse seemed less like an empty ruin and more like something waiting for him to notice it.
The metal door resisted at first, then gave with a dry shriek that made all three of them flinch. Inside, the air was colder and smelled of damp wood, dust, and old paper. Their torchlight skated across peeling walls, a collapsed chair, and a desk pushed beneath the narrow stairwell. On it lay a leather-bound diary, its cover cracked with age.
Maja reached it first. When she opened the book, the pages revealed tight, slanted handwriting broken by symbols, arrows, and lines of numbers that seemed to repeat in patterns.
"This is a code," she said quietly.
"Or a map," Tobias whispered, leaning closer. One of the sketches showed the lighthouse mechanism in unsettling detail, as if someone had studied it from the inside.
Victor turned another page and found a title written across the top in darker ink than the rest: The Last Lighthouse Keepers Code.
Then, from somewhere below them, came a sound.
Not the groan of the building settling. Not the scrape of wind against stone. A measured knock, deliberate and close enough to raise the hair on Victor's arms.
He moved to the window just as the light outside began to thin. Across the yard, half-hidden by the long grass, a shadow shifted near the base of the tower.
Maja snapped the diary shut. Tobias stopped breathing altogether.
The door shuddered under a heavy blow from the other side, and something outside hit it again, harder this time, as if whoever was there already knew they had found the book.