The morning whistle shrieked through the brass pipes that snaked along the ceiling of Cogsworth Academy, sending vibrations through every rivet and joint in the massive mechanical structure. Seventeen-year-old Lydia Hartwell jolted awake in her narrow dormitory bed, her copper-red hair tumbling across her face as steam hissed softly from the heating vents. The familiar symphony of grinding gears and churning pistons echoed through the walls, the heartbeat of New Mechanica that never ceased, day or night.
Lydia had grown up with these sounds, but today they seemed different somehow, more urgent, as if the great city itself was trying to tell her something. She dressed quickly in her standard-issue leather apron and brass-buttoned vest, the uniform of all apprentice engineers in the Steam Labyrinth City. Her fingers moved deftly over the small tools hanging from her belt: precision wrenches, a steam pressure gauge, and the prized possession of every apprentice—a personal magnifying lens crafted from the finest crystal.