Adam Kelly loved to play in the derelict houses, loved the musty smell of the old rooms, the way they creaked and groaned as he moved around inside them, the way the sunlight shone through the laths, casting striped shadows on the walls. He loved to leap the gaps between the broken stairs, heart in his mouth, and hop from rafter to rafter, kicking up plaster dust and watching the motes dance in the filtered light.

This afternoon, Adam had a whole village to play in.

He stood at the rim of the shallow valley, staring at the ruins below and anticipating the adventure to come. This was the day he had been waiting for. Maybe a once-in-a-lifetime opportunity. Anything could happen down there. The future of the universe depended on Adam today; the village was a test, one of the things he had to conquer before advancing to the Seventh Level.

The only other people in sight stood at the far end, near the old flax mill: a man in jeans and a red T-shirt and a woman all dressed in white. They were pretending to be tourists, pointing their video camera here and there, but Adam suspected they might be after the same thing he was. He had played the game often enough on his computer to know that deception was everywhere and things were never what they seemed. Heaven help us, he thought, if they got to it first.

He half-slid and half-ran down the dirt slope, skidding to a halt when he reached the red, baked earth at the bottom. There were still patches of mud around; all that water, he supposed, wouldn’t just evaporate over a few weeks.

Adam paused and listened. Even the birds were silent. The sun beat down and made him sweat behind his ears, at the back of his neck and in the crack of his bum. His glasses kept slipping down his nose. The dark, ruined cottages wavered in the heat like a wall behind a workman’s brazier.

Anything could happen now. The Talisman was here somewhere, and it was Adam’s job to find it. But where to begin? He didn’t even know what it looked like, only that he would know it when he found it and that there must be clues somewhere.

He crossed the old stone bridge and walked into one of the half-demolished cottages, aware of the moist, cool darkness gathering around him like a cloak. It smelled like a bad toilet, or as if some gigantic alien creature had lain down to die in a hot, fetid swamp.

Sunlight slanted in through the space where the roof had been, lighting the far wall. The dark stones looked as slick and greasy as an oil spill. In places, the heavy stone flags that formed the floor had shifted and cracked, and thick gobbets of mud oozed up between them. Some of the slabs wobbled when Adam stood on them. He felt poised over a quicksand ready to suck him down to the earth’s core if he made one wrong move.

There was nothing in this house. Time to move on.

Outside, he could still see no one. The two tourists seemed to have left now, unless they were hiding, lying in wait for him behind the ruined mill.

Adam noticed an outbuilding near the bridge, the kind of place that had perhaps once been used to store coal or keep food cold. He had heard about the old days before electric fires and fridges. It might even have been a toilet. Hard to believe, he knew, but once people had to go outside to the toilet, even in winter.

Whatever it had been, The Destructors had left it largely alone. About seven feet high, with a slanting flagstone roof still intact, it seemed to beckon him to come and vanquish it. Here, at least, was a structure he could mount to get a clear view. If the pretend-tourists were hiding nearby, he would see them from up there.

Adam walked around the outbuilding and was pleased to see that on one side a number of stones stuck out farther than others, like steps. Carefully, he rested his weight on the first one. It was slippy, but it held fast. He started to climb. Every step seemed solid enough, and soon he was at the top.

He pulled himself onto the roof. It only slanted at a slight angle, so it was easy enough to walk on. First, he stood near the edge, cupped his hand over his eyes to shield out the harsh sun and looked in every direction.

To the west stood the flax mill, and the strangers were now nowhere in sight. The land to both the north and south was covered in woods, so it was hard to see anything through the dense green foliage. To the east lay the teardrop shape of Harksmere Reservoir. On The Edge, which ran along the south side of Harksmere, a couple of car windscreens flashed in the sun. Other than that, there was hardly any movement in the world at all, hardly a leaf trembling.

Satisfied he wasn’t being watched, Adam struck out over the roof. It was only about four or five feet wide, but when he got to the middle he felt the faintest tremor, then, before he could dash the short distance to the other side, the thick stone slabs gave way beneath him. For a moment, he hung suspended in air, as if he might float there forever. He stuck his arms out and flapped them like wings, but to no avail. With a scream, he plunged down into the darkness.

He landed on his back on a cushion of mud; his left wrist cracked against a fallen flagstone and his right arm, stretched out to break his fall, sank up to the elbow.

As he lay there, winded, looking up at the square of blue sky above him, he saw two of the remaining roof slabs tilt and fall toward him. Each one was about three feet square and six inches thick, enough to smash him to a pulp if it hit him. But he couldn’t move; he felt trapped there, spellbound by the falling slabs.

They seemed to drift down in slow motion, like autumn leaves on a windless day. His mind emptied of everything. He felt no panic, no fear, just a sort of acceptance, as if he had reached a turning point in his short life, and it was out of his hands now. He couldn’t have explained it if he’d tried, but at that moment, lying on his cot of warm mud watching the dark stone flags wheel down across the blue of the sky, young as he was, he knew there was nothing he could do to avoid whatever fate had in store for him; whichever way it went, he could only go with it.

This must be the Seventh Level, he thought as he held his breath, waiting for the impact, waiting to feel his bones breaking, grinding against one another.

One slab fell to his left, embedded itself in the mud and tilted against the wall like an old gravestone. The other fell to his right and cracked in two against one of the floor flags. One half tipped toward him, just grazing his upper arm, which was sticking out of the mud, and raising a few drops of blood.

Adam took a few deep breaths and looked up through the roof at the sky. No more slabs. So he had been spared; he was alive. He felt light-headed. There was nothing seriously damaged, he thought, as he started to move his limbs slowly. His left wrist hurt a lot, and it would probably come up in one hell of a bruise, but it didn’t feel broken. His right arm was still thrust deep in the mud, and the slab chafed against his grazed elbow. He tried to wiggle his fingers under the mud to find out if he could still feel them, and they brushed against something hard.

It felt like a cluster of smooth, hard spindles, or a bundle of short rods. Curious, he pushed his arm in deeper and grasped it tightly, the way he used to hold his mother’s hand in town when he was very small and frightened of all the crowds; then he leaned his weight back over to the left, gritting his teeth as the pain seared through his injured wrist, and tugged.

Inch by inch, he dragged his arm free, keeping a firm grasp on his prize. The mud made sucking, slurping sounds as he pulled. Finally, he was able to free the object he was holding. He rested it against the slab and edged back toward the far wall to study it.

The thing lay against the flagstone in the dim light, fingers hooked over the top, as if it were trying to pull itself out of the grave. It was the skeleton of a hand, the bones crusted with moist, dark earth.