The ink had barely dried when Margot heard the familiar creak of weathered boots on the lighthouse stairs. She folded the letter carefully, her fingers trembling not from the November cold but from what she had written—what she finally understood after thirty-seven years of watching ships navigate the treacherous waters below.
“Another storm brewing,” called Henrik from the landing, his voice carrying that particular strain that came before the worst tempests. “The barometric pressure’s dropped faster than I’ve ever seen.”
Margot pressed the letter against her chest. Through the circular windows, she could see the ocean churning with an unnatural phosphorescence, the kind that old fishermen whispered about in taverns but never discussed in daylight. The sustainable fishing boats that had replaced the old trawlers were already heading to harbor, their solar panels glinting like fish scales in the dying light.
“Henrik,” she said softly, not turning from the window. “Do you remember what your grandfather told us about the migrations? The real ones?”
His boots stopped creaking. In the silence that followed, Margot could hear something else—a low humming that seemed to rise from the water itself. It was the sound she had been documenting in secret for over a decade, the one that preceded every major storm, every unexplained disappearance, every night when the lighthouse beam seemed to bend and curve of its own accord.
“Margot, what did you write in that letter?”
She turned then, and Henrik’s weathered face went pale. Her eyes held the same luminescence as the churning sea below.
“The truth,” she whispered. “About where we really came from. About what this lighthouse has been guiding home all these years.”
The humming grew louder, and through the windows, they could see shapes moving beneath the glowing water—vast forms that dwarfed the fishing boats, forms that pulsed with ancient intelligence and patient hunger.
Margot walked to the lighthouse lamp, her hand hovering over the switch. “They’ve been so patient, waiting for the oceans to rise enough, for the climate to shift just so. Waiting for someone to finally send the signal.”
“Don’t,” Henrik breathed, but his voice carried no conviction. Deep down, he had always known. Every lighthouse keeper’s family had known, passed down through generations like a genetic memory—they were not just guides for human vessels.
The letter slipped from Margot’s fingers as she grasped the lamp’s control. It fell slowly, almost floating, and Henrik caught a glimpse of the final lines before it touched the floor:
“The seas are ready. The old ones stir. The lighthouse keeper’s duty is done.”
She turned off the beacon.
In the sudden darkness, the humming became a song, and the phosphorescent glow from the water grew bright enough to illuminate the lighthouse from below. Henrik watched his wife’s face transform in that eerie light, her features shifting into something beautiful and terrible and completely alien.
Outside, the real migration was beginning.
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