The Willis Tower loomed over the Chicago skyline like a giant, glass-and-steel needle, but Elias was looking at a different kind of architecture.

In the dim glow of his desk lamp, his room had transformed. The textbooks on the "History of the Great Fire" and "Classic Literature" had been pushed to the floor. In their place sat a stolen Bunsen burner, a collection of cracked beakers he’d salvaged from the school’s disposal bin, and a laptop screen flickering with illicit chemistry forums.

His mother, Claire, had stopped knocking an hour ago. The house was silent, save for the distant, rhythmic hum of the Blue Line train rattling toward O'Hare.

Elias stared at the center of his desk. He had sketched a human torso, but it wasn't a standard biology drawing. It was a structural map. He had marked the myostatin pathways in red ink—the biological "brakes" that kept human muscles from growing too large.

"If I cut the brakes," he whispered, his voice raspy from the cold he’d picked up in the rain, "the engine doesn't stop."

The theory was a masterpiece of bio-hacking, but the execution was a nightmare. To create the Hypertrophic Catalyst, he needed three things that a sixteen-year-old in Wicker Park couldn't just order on Amazon:

Pure Myostatin Inhibitors: Available only in high-end research labs like the ones at the University of Chicago.

A Stabilized Peptide Base: Often used in illegal performance-enhancing rings.

The "Architect" Factor: A specific, synthetic enzyme that would allow his body to knit the new muscle fibers without tearing his own skin apart.

He pulled up a map of the Industrial Corridor—the jagged, rusted edge of the city where the factories breathed smoke into the gray sky. There was a place called The Yard, a sprawling scrap and chemical surplus site where the owners didn't care about permits as long as the cash was green.

Elias reached into his drawer and pulled out a small, wooden box. Inside was a stack of twenty-dollar bills—his savings for the summer architecture program he’d dreamed of attending. He looked at the money, then at the fading purple bruise on his jaw in the mirror.

The summer program was about building buildings. This was about building a weapon.

He stuffed the money into his pocket and grabbed his heavy coat. He wouldn't be able to get the inhibitors tonight, but The Yard might have the precursor chemicals he needed to start the first batch of the serum.

As he climbed out of his window and onto the fire escape, the cold Chicago wind bit at his face. He looked out over the city. To everyone else, Chicago was a grid of streets and lights. To Elias, it was a source of raw materials.

He climbed down, his boots hitting the wet pavement with a quiet thud. He wasn't the boy who got pushed into the mud anymore. He was a scavenger. He was an engineer.

He began to walk toward the South Side, disappearing into the fog of the "City of Broad Shoulders," looking for the ingredients to make his own shoulders broad enough to carry the world.