Karen made her way slowly along a primitive track through low-growing scrub until her headlights lit up the cottage down by the water. María had given her a key and told her where they kept a spare. It was sometimes useful to have an extra key hidden at the cottage.

She was looking forward to waking up tomorrow morning amidst the autumn colours of Thingvellir. For as long as she could remember people had flocked to the national park in the autumn, since few places in the country could boast such a brilliant display of colour as here by the lake where the rust-red and orange shades of the dying leaves extended as far as the eye could see.

She started to ferry her luggage from the car to the sun deck beside the door. Then, putting the key in the lock, she opened the door and groped for the light switch. The light came on in the hallway leading to the kitchen and she took her little suitcase inside and placed it in the master bedroom. To her surprise, the bed was unmade. That was not like María. A towel was lying on the floor of the lavatory. When she turned on the light in the kitchen she became aware of a strange presence. Although she was not afraid of the dark, she felt a sudden sensation of physical unease. The living room was in darkness. By daylight there was a superb view of the lake from its windows.

Karen turned on the living-room light.

Four solid beams extended across the ceiling, and from one of them a body was hanging, its back turned to her.

Shock sent her crashing back against the wall and her head slammed into the wood panelling. Everything went black. The body hung from the beam by a thin blue cord, mirrored in the dark living-room window.