Edda Vell counted breaths by the rasp of her rasp. It was not a ceremony she advertised, but it had become a clock: one careful inhale, two downward strokes across the file, a quick glance at the catch of light on the nearest key. By the time the rasp had eaten a sliver of bronze into something that might become a tooth, the street outside would be full of the morning's small liturgies—bellows puffing, loaves being slapped onto wooden boards, a boy two doors down juggling knives he was not yet trusted with. She liked the rasp. It answered back.
Her shop smelled of warmed metal and the faint sweetness of preserved citrus—every second Thursday the pastrywoman across the lane baked 'glints', tiny cakelets candied with bitter peel, and mercy knew the town loved them. The smell had nothing to do with locks, but it colored the room the way a neighbor colors your mood: unexpected and domestic. Edda kept a saucer of crumbs on the counter, not for customers but because crumbs were polite things to set out in a place where people handled other people's thresholds.
Tools hung in a careful constellated geometry that made sense only to hands that had learned their routes. Hammers in graduated crescents. Files like pale, obedient fish. A brass mandrel that looked, at a distance, like a praying thing. Edda's fingers moved with the worn certainty of someone who had spent decades teaching metal which way to bend; they did not fumble. She shaped a tiny shoulder on a key blank with a motion that folded muscle into thought—turn, press, slide—and the metal obeyed. The metal was honest in that useful way. It yielded or it broke.
She kept a small collection of ridiculous keys nailed above the workbench as a private joke: one the size of a thimble intended for the letters that had grown too shy to leave envelopes, another impossibly long with three teeth so elaborate that it would probably eat a coat if put in a pocket. Edda called them 'useless' not to be cruel but because they confessed the truth: keys could be made for anything. The town made other things too: bowls that sang when you poured soup into them, shutters that closed only if you whispered their owner's name, and watchmakers who made clocks that never agreed with each other but were perfect for polite conversation.
A knock came sharp enough to make the mandrel sing. It was impatient, more panicked than any polite customer should ever be. Edda set her file into the sink of scrap and wiped her hands on a rag that had seen more apprentice hands than a bridge had seen carts. She did not like being interrupted. She did not like being interrupted twice in one morning. The shop did not interrupt her. It held still and let her work its small wonders.
'It's Toren,' said the voice that followed the knock, breathless and alley-smelling. 'Toren Hale. I—' He pushed inside before she had the chance to say 'say it simply' and overbalanced a basket of turnips as though the earth had decided them frivolous. He looked as if he had been running for half a sermon.
Edda's first move was professional: she set down the key she had been coaxing free of its blank and tilted her head, the same way a seamstress would hold a warp to the light. Her second move was something she had practiced in private, a fine draw on the rag to remove the last of the file dust from her nails. 'This had better be about a jammed lock and not the council's plans to paint the fountain purple,' she said. Her mouth made the joke before her hands told it they were done. That was her pattern: jokes as little wedges to keep anyone from leaning too close.
Toren gulped. 'It's not the fountain,' he said. 'It's the Common Hall. The threshold has sealed and there are people inside. Lina's laugh—my daughter's—it's in there and she won't stop laughing but she can't get out. People are... they're crowding. They say it's not a lock like we know.'
The rasp in her hand felt suddenly large, like a little animal looking to be petted. Edda slid the key between two fingers and folded the rag with a motion that tightened her shoulders. The Common Hall's threshold was a public thing, more ritual than door: meetings, weddings, the odd market of surplus cloaks. It was a place that belonged to all the town's hands. If something had sealed it from the inside and kept a child's laughter bottled, it was not going to be the sort of fix you left to a mason's prybar.