AFTER DINNER HE went to the back of the cave and slid into the dust bath. The dust was so fine and light that it slipped around his body like oil, its inherent warmth soothing Trey’s tired muscles. A little firelight found its way back here, and Trey enjoyed watching it flit across the walls like lost insects. He imagined that it was performing its own play for him, and as he drifted away he made up stories to follow the dim light’s movements.

His mouth was sweet and sensitive from the fist of fledge he had chewed as part of the meal. His mother had taken some too, and she had fallen asleep soon after. She was old now, and she rarely made any effort with the fledge. It must haunt her dreams, but there was nowhere specific she wanted it to take her. Trey pitied her sometimes, and other times he was jealous. His own life seemed so meaningful that he wondered what it would be like to not care anymore.

The fresh fledge was so much purer and more powerful than anything sold or used topside; it faded as it rose, and sunlight drove it stale. Some young fledgers did try to make it on the surface, offering to sell their talents to the highest bidder, but their sight would soon fade away. And as fledge lost its effect, so the fledgers’ talent to use it dwindled. It was as if the sun was so alien to them that it treated them the same as their drug, and they all became just another topsider waiting for death.

Trey had never been tempted to the surface by false dreams of power or status. His home was the underground. And he loved his fledge fresh. It passed from his stomach straight into his bloodstream, thinned the blood and drove it faster, speeding his heart, finding his organs and massaging them with its benevolent touch. Plunging into his heart and out again, the drug surrounded the goodness in his blood and made itself a part of it, riding directly into Trey’s brain, where, like something almost sentient, it settled itself onto and into everything that made Trey what he was. It played with his memories, aggravated his desires, stirred his emotions, and with a slight effort of control Trey reined in the power of his mind and rode it like a horse. Trey’s mind—young and energetic, yet old enough to know some of itself—was the perfect age to lord over the fledge’s influence. A fledge journey was more than memory and less than experience, a realm hanging somewhere between dream and recollection, knowledge and foresight. And because of that, it was precious.