Squiglet is a monster who lives in a plain white world, which he populates using a magic crayon. Squiglet uses a straight line to squiggle a jolly lady called Old Mother Hubbard who is in a hurry to get home and feed her dog, Twinkle. Squiglet helps out by squiggling her kitchen and he soon meets Twinkle, the biggest, hungriest dog he has ever seen. But there is a problem: Old Mother Hubbard's cupboard is bare! So off they all go to the supermarket to get a box of Twinkle's favourite doggie treats - Biccie Bones! He's going to need a lot to fill him up, so Squiglet squiggles a shopping basket big enough to carry them all. Only they can't seem to find any Biccie Bones. And then a shop assistant tells them that they've run out! What's poor Twinkle going to do?!