Prologue

      Corn Blossom choked on the first sip of the potion and her eyes filled with tears. Despite the harsh, bitter taste, she had to drink every drop. The eleven-year-old brushed aside her tears and took another, bigger swallow from the shaman’s feather-decorated gourd.

      From the ledge on which she stood, the far side of the canyon was a wall of black, topped by a starry sweep of sky. Trapped heat came off the distant rock in waves, pulsing through the breathless night. Her clan made its home in a broad hollow high in the canyon face, carved over millennia by wind-driven sand. Light from the communal firepit flickered over their flat-sided, mud-brick dwellings.

      Hundreds of feet below, the rustling sounds grew much louder. Something crashed through the dry grass and chapparal on the canyon floor. Something huge and powerful. Drawing strength from their fear, Corn Blossom’s people began to chant and beat drums with sticks, this to drown out the terrifying noises. Like her, they had painfully bloated bellies and their lips were cracked and bleeding.

      The rain had stopped two winters past, rain the clan depended upon to grow squash, corn and beans in the canyon, and on the mesa directly above the cave. As the stockpiles of food in their stone-lined pits dwindled, Corn Blossom’s people scavenged far and wide, but there was no game left in the canyon, and the fish had vanished along with the river. They were reduced to eating grass and insects. A world that had been lush and full of promise had become a wasteland of suffering and slow death. Dust storms divided the day, and at night the blistering air spawned hungry demons.

      Neighboring settlements in the other galleries along the canyon’s cliffs had already been abandoned, the long ladders discarded, the dark window openings and doorways of vacant houses like the eye sockets and drop-jawed maws of piled skulls.

      The people who left the canyon were never heard from again. No trace of them was ever found. No campsites. No clothing. No bones. To spend even one night on the canyon floor meant destruction. Under the light of the full moon, Corn Blossom’s own father had disappeared like a curl of smoke.

      Before descending the ladder to face and fight the evil that was bedeviling them, he had given her a necklace, his most prized possession. As she drained the last of the shaman’s potion, she tightly squeezed the small white shells between her fingers. In Corn Blossom’s world, before the coming of Colombus, before Heisenberg, Einstein and Rutherford, all events were connected, like the string of beads around her neck. In 1300 A.D., coincidence didn’t exist; everything that happened had a cause. It was a logic born of ignorance. Of desperation. Of fear.

      Logic said something had brought this calamity upon her people. It said such causes could be addressed, disastrous outcomes averted by human action. Of the ten young girls in her encampment, Corn Blossom was the brightest, the happiest, the quickest. Cherished by all. Logic said only she could appease the angry gods, because it was her life, her joy, they coveted.

      As the herbal concoction took effect, Corn Blossom swayed on the balls of her feet. She felt light enough to lift off and float free of the earth. Then she began to dance to the drums, her bare feet shuffling in the dust, eyes burning from the potion and the shifting pall of smoke.

      After she had made a number of slow circuits around the firepit, the shaman led her to the domed rock that jutted from the lip of their ledge like a bowsprit.

      Corn Blossom climbed to the crest of the rock and looked back at her mother, her sisters, brothers, aunts, uncles and grandparents. Their drumming and chanting was mixed with sobbing and shrill cries. She loved them, and she loved the world as she remembered it, before the rain stopped falling. For the return of that happy time, no sacrifice was too great. She turned away from the familiar faces, her heart aching.

      Arms spread wide, Corn Blossom closed her eyes and jumped into the dark.

      The shaman had promised her no pain.

      He was almost right.

      The wind whipping past her ears drowned out the drumbeats and the screams of sorrow. When her head hit the sloping cliff some fifty feet down, there was an instant of sharp discomfort, then her unconscious body started to tumble and bounce. She never felt the impact with the canyon floor.

      At daybreak when her people climbed down, they found no body. The only footprints in the sand were theirs.

      SOME SEVEN HUNDRED YEARS later, in the spring of 1992, a Korean war-surplus 6x6 stopped on the same canyon floor. The river flowed cloudy and green in a deep channel along the foot of Corn Blossom’s cliff. Among the ten tourists sitting in the bench seats on the truck bed was a stocky black woman in her late twenties. She aimed her 35 mm camera at the high cleft. The telephoto zoom lens revealed a double row of deserted structures partially hidden in shadow.

      A thirteenth century high-rise, Dr. Mildred Wyeth thought, snapping the shutter. She wished she could have seen the view from up there. But that was impossible because the archaeological site, like the others in the canyon, was off-limits to nonmembers of the Hopi tribe, who owned the land.

      Other shutters clicked around her, like spastic castanets.

      With the long lens Mildred picked out the hand- and footholds chipped into the nearly vertical bedrock—the commute to and from the canyon bottom had been perilous, to say the least.

      The canyon’s vanished residents had been a vigorous, athletic people with no fear of heights. A stark contrast to Mildred’s fellow passengers, who preferred to have their life experiences spoon-fed to them while sitting down. Her companions for the day included four Japanese men in Bermuda shorts; an impatient German couple who had brought along enough food for six, but had offered to share none of it; and three portly, middle-aged American ladies in brand-new, pastel bill-caps, T-shirts, daypacks and hiking shoes.

      Mildred would’ve much rather explored the canyon on foot or horseback, but the constraints of a week-long holiday and a lengthy itinerary made that impossible. It