In a devastated world where the remnants of humanity reside in a colossal, underground silo, life adheres to strict rules and a rigid hierarchy. The desolate outside is off-limits, its mere mention a taboo, until Sheriff Holston shatters centuries of obedient silence with a perilous wish: he wants to go out. Juliette, a down-deep mechanic with an aptitude for machine repair, suddenly finds herself appointed as the new enforcer of law. As she grapples with this unexpected promotion, Juliette's inherent defiance leads her to a harrowing path teeming with forbidden secrets and woeful discoveries. Challenging the very foundations of the silo's existence, she may unearth truths that have the power to provoke an uprising or extinguish humanity's flickering flame entirely.