Amelia and her younger brother Gus, new to Silver Creek and focused on the Junior Gingerbread Competition, discover a box hidden in their basement. The box is tied with a distinctive 'Solstice Blue' ribbon, which Gus recognizes from historical town documents as being used for high-priority transfers related to the old clock tower. Inside the box, they find several small stones etched with moving silver lines. When Gus handles one, it causes the small, star-etched silver gear (previously found at the Post Office) to vibrate intensely. Gus finds a reference in his town pamphlet linking these 'Key Stones' to the original stabilization of the Solstice Chime. The episode ends with a deep, metallic hum emanating from the Whispering Woods, suggesting a large mechanism is being activated.