Apprentice Tinsel and Journeyman Burl discover a catastrophic conceptual failure in the Glee Reservoir. Instead of conceptual erasure, the system is registering a precise, negative value, indicating a full emotional inversion into the opposite of joy. Tinsel identifies the theoretical cause as the Echo of Absolute Disappointment, a banned artifact. Burl decides they must bypass standard protocol and use the lower maintenance tunnels to find the source of the inversion before it solidifies, moving into a more dangerous, lore-heavy area of the operational system.