Piura's Plaza lay in the midday heat. The stones were so warm that Perusino claimed you could roast corn on them. Perusina didn't quite believe him, but she still preferred to step into the shade of the palm trees.

Franz had his tongue sticking out a little. For a Sechura fox, heat was nothing new, but this city smelled different: of dust, engines, fruits, dry leaves, and somewhere, water.

Then Perusina stopped. Before them lay the shadow of a bare branch. It didn't point sideways, like all the other shadows. It pointed diagonally across the plaza, directly between two mototaxis.

"That can't be," Perusina said. She squinted one eye and held her pencil vertically into the sun. "The shadow should fall differently."

Perusino leaned forward. "Maybe the shadow got lost. In this heat, I'd understand."

Franz sniffed. First at the shadow, then at the branch, then at the ground beneath it. Suddenly, he dug with a paw in the dust. Not deep. Just enough until darker earth appeared.

Perusina touched the spot. "It's cool."

Under the carob tree, a small clay pot lay half in the shade. It was empty, but wet earth clung to its rim. Perusino looked inside. "No juice. No food. Suspicious."

Franz snorted. Then he nudged the pot. It rolled a bit to the side and stopped exactly where the strange shadow continued.

Perusina slowly understood. "Maybe the shadow isn't showing us where the sun is. Maybe it's showing us where it's still cool."

Suddenly, the plaza was no longer just a place. It was a map of light, dust, and shadows.

They followed the cool spots. Not quickly, but carefully. From one narrow shadow to the next, along balconies, past a wall where the heat shimmered.

Perusino was the first to notice that they weren't walking randomly. "We're always going downhill," he said. "Very slightly. But I can feel it in my knees. And in my bread. It's sliding forward in my bag."

The street became quieter. The dust smelled stronger. Franz walked ahead, stopped, and turned around, as if to say: Finally, you've noticed too.

At the edge of the Río Piura, the river was not wide and loud, but narrow and quiet. A thin line of water stretched between dry sand and small plants. Tiny boats made of leaves floated on it.

"Who built them?" Perusina whispered.

A gust of wind pushed one of the boats further. Franz tapped it with his paw, very carefully. The boat trembled, turned, and floated away.

Perusino looked back at the city. "The shadow didn't want to be mysterious at all. It wanted to show us where the water is."

Perusina nodded. "In Piura, shade isn't just shade. And water isn't just water. Both can be a clue."