I should have known the holiday was going to be eventful when I managed to leave my car keys on the ferry from Denmark. Not the car, mind you, just the keys, sitting there on a plastic table next to half a cup of cold coffee. By the time I realised, somewhere past Gothenburg, we were far too committed to turn back. My partner gave me that look, the one that says "I love you but honestly," and we pressed on toward Arjang in Varmland, me silently praying the spare set was actually in the suitcase.

It was not.

We rolled into Arjang Glaskogen late on a Thursday evening, me already rehearsing my apology to the property owner, a chap called Sten whose emails had been brisk but not unkind. The cottage sat among birch and pine, red paint glowing faintly in the last of the summer light, looking every bit the Swedish idyll. Sten emerged from the neighbouring house before I'd even killed the engine, tall and grey-haired, wearing wellies despite the dry weather and carrying a mug that steamed in the cool air.

"No keys," I said, stepping out with my hands raised in surrender.

He took a long sip, looked at me, looked at the car, then laughed, a proper belly laugh that crinkled his eyes. "This happens more than you think. Last month a German couple locked their dog in with the engine running. The dog was fine. The car less so." He produced a spare key from his pocket with a flourish, apparently standard issue for forgetful Brits, and waved us inside.

The cottage smelled of pine and something faintly herbal. Sten's wife, Kerstin, appeared through the back door with a jar of pickled something and strict instructions about the compost toilet. "Not complicated," she said, fixing me with pale blue eyes. "But you must commit. Half measures make a smell." I nodded gravely, feeling I'd been entrusted with sacred knowledge.

By morning we'd met the lake. Glaskogen's waters stretched grey-green and still, and we were barely out the door when a voice called from the neighbouring jetty. "You're the key people!" A woman called Maj, perhaps seventy, sat fishing with a patience that suggested she'd been there since dawn. She insisted we take two of her spare rods, refused our protests, and spent twenty minutes explaining exactly where the perch were hiding and why we would ignore her advice. "Everyone does," she said, utterly unbothered. "Then they come back asking. I will be here."

We ignored her advice. We came back asking. She was there, unsurprised, and directed us to a spot near some submerged rocks where, against all probability, I caught something that was definitely not a perch but was at least alive. Maj inspected it with professional disappointment. "This is a pike. Small. You will throw it back and tell people you caught something bigger." I did. I have.

The village shop, a converted petrol station run by a heavy metal enthusiast called Lars, became our daily pilgrimage. He sold excellent coffee, dubious fishing lures, and unsolicited opinions on British politics with equal enthusiasm. "Your politicians," he announced one morning, pouring my coffee with surgical precision, "they dress like children at a funeral. Our politicians dress like funeral directors at a disco. I prefer this honesty." I couldn't argue. I bought more lures.

Evenings brought Sten and Kerstin with irregular generosity, a bowl of cloudberries one night, stern warnings about moose on the road the next. Sten had worked the forests for thirty years before retirement, and spoke of trees with the affection most people reserve for difficult relatives. "This birch," he said, gesturing at one near our window, "I have known since it was stupid and young, like you with your keys." I felt oddly complimented.

By the week's end, the keys had been couriered from Denmark at embarrassing expense, and I'd learned that Maj's husband had been a champion accordion player, that Lars had never visited Britain because "the beer is too warm and the metal too soft," and that Kerstin judged all visitors by their compost toilet discipline. We passed, barely.

Driving away, my partner asked what I'd remember most. The lake, certainly, the silence, the strange light. But mainly the people, generous and odd and utterly themselves, who'd turned a holiday defined by my own stupidity into something I hadn't expected. Sten waved from his doorway, wellies on, mug in hand. I waved back, keys clutched tight, already plotting a return.