I stared into the distance, sick with disbelief that was turning quickly to horror.

Yesterday morning I’d eaten the last mangled Twinkie for breakfast. Yesterday afternoon I’d found the double peak and turned east again. Melanie had given me what she promised was the last formation to find. The news had made me nearly hysterical with joy. Last night, I’d drunk the last of the water. That was day four.

This morning was a hazy memory of blinding sun and desperate hope. Time was running out, and I’d searched the skyline for the last milestone with a growing sense of panic. I couldn’t see any place where it could fit; the long, flat line of a mesa flanked by blunt peaks on either end, like sentinels. Such a thing would take space, and the mountains to the east and north were thick with toothy points. I couldn’t see where the flat mesa could be hiding between them.

Midmorning—the sun was still in the east, in my eyes—I’d stopped to rest. I’d felt so weak that it frightened me. Every muscle in my body had begun to ache, but it was not from all the walking. I could feel the ache of exertion and also the ache from sleeping on the ground, and these were different from the new ache. My body was drying out, and this ache was my muscles protesting the torture of it. I knew that I couldn’t keep going much longer.

I’d turned my back on the east to get the sun off my face for a moment.

That’s when I’d seen it. The long, flat line of the mesa, unmistakable with the bordering peaks. There it was, so far away in the distant west that it seemed to shimmer above a mirage, floating, hovering over the desert like a dark cloud. Every step we’d walked had been in the wrong direction. The last marker was farther to the west than we’d come in all our journeying.

“Impossible,” I whispered again.

Melanie was frozen in my head, unthinking, blank, trying desperately to reject this new comprehension. I waited for her, my eyes tracing the undeniably familiar shapes, until the sudden weight of her acceptance and grief knocked me to my knees. Her silent keen of defeat echoed in my head and added one more layer to the pain. My breathing turned ragged—a soundless, tearless sobbing. The sun crept up my back; its heat soaked deep into the darkness of my hair.

My shadow was a small circle beneath me when I regained control. Painstakingly, I got back on my feet. Tiny sharp rocks were embedded in the skin on my legs. I didn’t bother to brush these off. I stared at the floating mesa mocking me from the west for a long, hot time.