The final page is a blank form: "Monthly Inspection Checklist." Empty checkboxes stretch into the white void, waiting for a hand that will never sign. And below them, a small footnote: "Plume visible under high humidity conditions."

Page two offers a photograph. A hyperboloid shell against a bruised sky, its plume a white flag of surrender to the second law of thermodynamics. You’ve seen these towers from highways: lunar landscapes of industry, humming with a low-frequency thrum you feel in your ribs. But here, in the PDF, the plume is frozen. A cloud that will never dissipate, pinned like a butterfly to a grid of coordinates.

On the first page, a diagram. The tower rises in cross-section like a concrete hourglass, its waist pinched by the logic of thermodynamics. Arrows trace the path of waste heat: a river of it, scalded and tired, climbing out of some unseen power plant’s guts. Then the fill media—those plastic honeycombs where water slums itself into droplets, desperate to touch air. The cooling happens in the dark, in the churn, in the arithmetic of evaporation.

The file is closed. But the cooling never stops.

You close the PDF. The icon winks on your desktop— cooling tower.pdf —a concrete ghost trapped in a silicon envelope. But outside your window, somewhere near the edge of town, a real tower is whispering steam into the dusk. And if you listen closely, past the traffic and the wind, you can hear the arithmetic of survival: drop by drop, degree by degree, the endless, invisible transaction between hot water and cold air.