Miss Hoolie finds PC Plum's bird book in her cupboard, which reminds her to put out some nuts for the birds outside so that they can feed on them in the cold weather. But whenever she goes to check on the birds, the nut bowl is empty! Josie Jump arrives at the nursery and shows Miss Hoolie the dance mix for the nursery children's dancing lesson later on. Miss Hoolie tells Josie about the nut situation and tells Josie that the bag is empty! So Josie goes off to buy some more nuts at Pocket and Sweet's and then she puts the nuts into the bowl ready for the birds. But, yet again, the nut bowl is empty! Somebody mysterious has stolen the nuts. So Josie Jump decides to go and visit PC Plum as he is great at solving mysteries. Josie explains to PC Plum about the nut crisis and then PC Plum decides to investigate who the mysterious nut thief is. He buys some bird nuts from Pocket and Sweet's and puts them out for the birds. But then Miss Hoolie, Josie and PC Plum see a squirrel eating the nut