On the morning the river ran backwards, no one thought to write it down. By lunchtime, half the town had forgotten it happened. That bothered Anna more than the river itself. She worked at the local archive, where forgetting was considered a professional enemy. She collected newspapers, diaries, photographs and shopping lists rescued from old houses. Yet when she asked witnesses what they had seen that morning, their memories blurred. “River?” the baker said. “It always flows that way.” “No, it doesn’t.” He shrugged. By evening, Anna was the only person who remembered. She wrote everything down. At midnight, the words vanished from the page. The next morning, she found something waiting outside the archive: a wooden music box, soaked with river water. When opened, it played seven notes. The eighth never came. Anna searched the archive. Eventually, she discovered a photograph from 1891 showing hundreds of townspeople beside the same backwards-flowing river. Written beneath it: DON’T LET THEM FINISH THE SONG. She found similar photographs every thirty-three years. Each contained musicians. Each mentioned an unfinished melody. That night, music drifted from the abandoned concert hall. Inside, the town orchestra sat onstage, though none remembered arriving. They played the seven-note melody. Anna ran towards the conductor. “Stop!” He lowered his baton. The eighth note hung in the room without being played. And suddenly everyone remembered. The river. The photographs. Every previous reversal. The melody had never needed completing. Its final sound was the moment before sound itself. Outside, the river turned quietly towards the sea. The orchestra finally agreed the missing note had been there all along.