Celeste is proud of the pumpkins she and her mother grew. They're large and round and orange and glorious to look at. But someone in Cripley Hollow doesn't agree. Someone is smashing all the pumpkins in town! But who would do such a thing? Halloween is a big deal in Cripley Hollow. When the pumpkin smasher visits Celeste's pumpkin patch, Grumblemunch and Professor Prettypaws set off to find the culprit. Can they do it in time to save Halloween?