Rebecca, an 18-year-old part-time cashier, spends her free time binge-watching TV shows and escaping into dog-eared paperbacks. Her sharp wit masks a heart scarred by her father’s unresolved disappearance—a loss that fuels solitary nighttime walks through Chimney Town’s fog-draped streets. Convinced answers lurk in the industrial maze beneath the city’s smokestacks, she trades shifts at the grocery store for clandestine tunnel expeditions armed with a flickering flashlight and her father’s old journal. Her tenacity draws her to Lubicchi, a soot-streaked chimney sweeper whose local knowledge proves invaluable. Together, they decode symbols scratched into tunnel walls and dodge unstable passageways, their bond strengthening through shared risks. Rebecca’s pockets always carry peppermints for cranky shopkeepers and bandages for Lubicchi’s scraped knees—quiet testaments to her nurturing nature. When tunnel collapses separate them or cryptic clues dead-end, she recalibrates strategies with the precision of a chess player, her father’s pocket watch ticking steadily in her grip. The town’s whispered legends of underground dangers only harden her resolve, each step through damp darkness bringing her closer to truths that could mend her fractured past or unravel it entirely.