Cora and Leo, two apprentices assigned to the quiet, insulated Library Sub-Basement Archive, discover that the resonance cold is affecting delicate acoustic machinery, specifically antique music boxes. They find that the music boxes are not just mechanically failing but are actively absorbing kinetic energy and sound vibrations, proven when Leo's silver tuning fork immediately dampens upon contact with a 1908 music box. This discovery connects the resonance drain to material vibration preservation, mirroring the issues seen with ribbon adhesion and structural integrity. Leo locates an old tin of Acoustic Damping Paste, noting that its ingredients include Felt Dust Composite, linking this new problem to the material solutions used elsewhere in town. The episode concludes with Cora preparing to apply the warm paste to a frozen brass latch on the music box, seeking to access its internal workings to understand its connection to the town's overall acoustic resonance.