Timmy and Beatrice, two postal apprentices at the Silver Creek Post Office, discover a critical error in the outgoing packages destined for the high-altitude village of Frost Hollow. Every package is underweight because the required resonance-dampening wax has been replaced with a much lighter, but less effective, material called Sky Dust. This substitution will cause the contents to freeze when the Star Seed is planted and the main thermal anchor is activated. Beatrice recalls lore about using pure sound to stabilize insulation materials. They determine they must find a source of pure silver sound, possibly the resonance-drained silver bells at the Carillon of Wishes, to temporarily lock the Sky Dust’s protective properties in place before the delivery window closes and the town lighting ceremony begins, linking their logistical problem to the wider acoustic crisis affecting Silver Creek.