Outside it was completely silent. There was no sound of wind. In Shetland, when there was no wind it was shocking.

People strained their ears and wondered what was missing. Earlier in the day there had been a dusting of snow, then with dusk this was covered by a sheen of frost, every crystal flashing and hard as diamond in the last of the light, and even when it got dark, in the beam from the lighthouse. The cold was another reason for Magnus staying where he was. In the bedroom the ice would be thick on the inside of the window and the sheets would feel chill and damp.

He must have slept. If he'd been awake he'd have heard them coming because there was nothing quiet in their approach. They weren't creeping up on him. He'd have heard their laughter and the stumbling, seen the wild swaying of the torch beam through the uncurtained window. He was woken by the banging on the door.

He came to with a start, knowing he'd been in the middle of a nightmare, but not sure of the details.

'Come in,' he shouted. 'Come in, come in.' He struggled to his feet, stiff and aching. They must already be in the storm porch. He heard the hiss of their whispers.

The door was pushed open, letting in a blast of freezing air and two young girls, who were as gaudy and brightly coloured as exotic birds. He saw they were drunk. They stood, propping each other up. They weren't dressed for the weather yet their cheeks were flushed and he could feel the health of them like heat. One was fair and one was dark.

The fair one was the prettier, round and soft, but Magnus noticed the dark one first; her black hair was streaked with luminescent blue. More than anything, he would have liked to reach out and touch the hair, but he knew better than to do that. It would only scare them away.

'Come in,' he said again although they were already in the room. He thought he must sound like a foolish old man, repeating the same words, making no sense at all. People had always laughed at him. They called him slow and perhaps they were right. He felt a smile crawl across his face and heard his mother's words in his head.