This episode introduces two new apprentices, Merry and Gable, working in the Grand Display Hall. They discover that the Joy Regulator, the central mechanism for distributing festive energy, has completely ceased function, showing a flatline on its Festive Output gauge. While the town below is dealing with systemic failures, Merry and Gable face a localized, but devastating, failure of machinery intent. Gable is practical and rule-aware, while Merry is more intuitive and lore-sensitive. They notice a faint, almost nonexistent flicker of emerald green emanating from the emergency soot removal vent shaft near the floor. Despite the absolute prohibition against using these vents for anything other than soot disposal, the inert state of the Regulator forces them to consider this forgotten access route as their only hope to find the source of the machinery's loss of will and restart the festive output.