Senna pressed her fingers against the crease in the canyon wall. It was warm — warmer than paper should be, warmer than stone pretending to be paper. She traced the line downward, watching it fork into two smaller creases, then four, then a web of tiny folds no wider than a fingernail.
The map in her satchel said this canyon didn’t exist. She’d checked twice before descending, once at the ridge and once at the first switchback where the path turned from packed parchment to something softer, almost fibrous, like the world was remembering what it was made of.
✽ ✽ ✽
“Cartographers don’t go into unmapped places,” her mentor Aldric had told her, the day she’d received her brass compass and vellum credentials. “They wait for scouts to come back. Then they draw.”
But Aldric had never seen a crease like this one. Senna had shown it to three senior cartographers, and each had said the same thing: “Artifact. Fold stress. Ignore it.”
Except fold stress didn’t pulse with warmth. Fold stress didn’t hum when you pressed your ear against it. And fold stress certainly didn’t glow faintly gold at sunset, which is exactly what this crease was doing now, painting Senna’s fingertips in light the color of old coins.
✽ ✽ ✽
She pulled out her field journal — a compact thing bound in waxed paper, its pages already half-full of sketches and measurements — and began to draw. The crease, the forks, the warmth gradient. She wrote in the margin: “Responsive to touch. Thermal anomaly confirmed. Not fold stress.”
Below that, in smaller letters: “I think this is a seam.”
In Papierra, seams were the stuff of myth. The places where the original sheet had been joined to itself during the Three Folds. Most scholars believed they were metaphorical — a poetic way of describing geological boundaries. But the old texts, the ones Aldric kept locked in the archive’s deepest drawer, spoke of seams as something else entirely: doors.
Senna closed her journal, shouldered her satchel, and did the one thing a cartographer was never supposed to do.
She stepped into the unmapped dark.