The air in the Metropolis smells of recycled sweat and burnt plastic. I live in Sector 84, which is a polite way of saying I live in the plumbing.

My world is a series of humming pipes, leaking valves, and the distant, rhythmic thumping of the Great Core. I am a Vent-Crawler. I spend my days sliding through narrow shafts, scrubbing carbon buildup off the filters so the people in the Upper Tiers can breathe air that doesn't taste like a junkyard.

From my vantage point, the Metropolis is not a miracle of engineering; it is a parasite.

I can hear them, the 'Sun-Dwellers.' Their voices drift down through the vents—light, airy, filled with the boredom of people who have never known hunger. They talk about the 'Grand Voyage' and the 'Destiny of Man.' They speak as if the ship is a palace, forgetting that the palace is held up by a million people like me, crawling in the dark.

Once, I climbed higher than I was allowed. I found a grate that looked out into the Solar Plaza. I saw a woman in a dress made of real silk, laughing as she held a glass of champagne. She looked so fragile, so clean. She didn't know that three floors below her, a man was coughing up black sludge into a bucket.

I didn't feel envy. I felt a profound, cold distance. We were on the same ship, breathing the same air, but we were different species. To her, I was just a sound in the walls, a ghost in the machinery.

The Great Voyage has lasted for six hundred years. The people in the Upper Tiers have forgotten what a planet looks like. To them, the Metropolis is the only universe. They've turned the ship into a city, and the city into a religion.

One day, the ventilation in the Plaza failed. For ten minutes, the air from the Sump—the thick, oily, stinking breath of the lower decks—surged upward. I watched through the grate as the woman in the silk dress gagged, her face twisting in horror as she smelled the reality of her existence.

She looked around in panic, her eyes searching for the source of the stench. For a second, I thought she looked right at me.

I didn't move. I just watched her. I wanted her to smell it. I wanted her to know that the air she breathed was a gift from the people she ignored.

Then the backup fans kicked in, and the smell vanished. The woman smoothed her dress and went back to her champagne, but she looked a little paler.

I slid back down into the dark, the humming of the pipes welcoming me home. I am a Vent-Crawler. I am the ghost in the machine. And as long as I am here, the Metropolis will never truly be clean.

*** OTMES-V2-CODE: [V-06]-[T7-01]-[N2:0.8,M3:7.0,M5:6.0,theta:180]