The oily silver rain of May 1, 2072, fell upon the Cascade Sprawl like a plague of locusts on a rotten frontier, bringing with it a novel prion variant that began to rewrite human biology. I tightened my grip on my lever-action rifle, a rusted relic of defiance in a cyberpunk wasteland, as I watched my wife, Sarah, pacing the floorboards of our decaying apartment. She had only gone out to scavenge for clean rations, but she returned profoundly changed, her skin shifting with iridescent metallic highlights, her movements possessing the fluid, predatory grace of a wild cougar, and her eyes catching the dim neon light like polished coins. The whispered legends spoke of a promised land beneath 47th Street called The Compound, a pre-collapse military bunker holding a pure water source and a localized cure, guarded by the ruthless Iron Veins outlaws and Sister Mara's crazed rain-worshipping zealots. My peripheral vision abruptly flared with ethereal blue text detailing my humanity index and newly crystallized skills like Pharmaceutical Looting and Spine-Aware Combat, while my hand instinctively brushed my meager inventory: a single dose of expired suppressant, a tarnished paper crane folded in Sarah's memory, and a crackling radio tuned to Captain Harlan's grim broadcast. The realization that my own countdown had started hit me with a crushing pressure behind my eyes, the unmistakable arrival of Stage One: The Headache. A copper tang flooded my mouth that no amount of canteen water could wash away, and as I stepped toward the glass to confront the shadowy, ashen reflection staring back at me from the rain-streaked window, a chilling blue notification flashed across my retinas: [System Alert: Foreign Prion Detected. Adapt or Perish?].