This anthology episode focuses on Leo, a young apprentice decorator in the Community Kitchen's finishing annex, whose specialized crystalline sugar glaze fails to adhere to his gingerbread sleighs due to the spreading resonance cold. Mrs Periwinkle confirms the glaze is losing its binding energy. Leo recalls seeing a box marked with a dark green seal in the restricted archive annex, leading him to discover the Grotto Seal stones, which are known to absorb ground coldness. They use the stones to create temporary localized safe zones, allowing the sugar glaze to cure successfully on the sleighs. However, upon inspection, Mrs Periwinkle discovers that while the stones absorb the cold, they also desiccate and weaken the material they rest upon, revealing that the Grotto Seals are a costly counter-agent that sacrifices structural integrity for temporary thermal stabilization. This deepens the mystery surrounding the hidden costs of fighting the resonance.