Eva Wingdale and her class are excited about their trip to Poppy's Pumpkin Farm, where every year, there is one very large, extra special, thank-you pumpkin. But on the second day of the visit the owls find that the Thank-you Pumpkin has gone missing, and the farm animals are in an uproar--so Eva and the other owls turn detective to solve the mystery of the missing pumpkin.