Slightly Spooky Tale of Fox and Mole

Fox and Mole live alone on a headland, in two houses, side by side. Mole is carefree and self-centred. Fox is responsible and self-sacrificing. As autumn draws in, the friends read a spooky story together (that Mole keeps interrupting) about a racoon who transforms into a scuffling monster (a slightly spooky bit) while Mole eats Fox's cookies (all of them). Fox's anger with Mole's lack of consideration builds, and when Mole forgets Fox's birthday, Fox too begins to transform... Can Mole recognise what's wrong and fix things before it's too late?