Mrs Fitzwitz mistakes her dog Nefertiti for the fat fox Ivo, who is greedy enough to settle down with the generous Fitzwitz. Nefertiti, however, has disappeared without a trace. Törtle is worried when he sees that the dogs of Muddlemere blame Ivo for the disappearance and are chasing him. To find out what has happened, Törtle must track down the lost dog as quickly as possible.
