Scriobag is a monster who lives in a plain white world, but with the help of her pencils and paper it does not stay white for long. Sgrìobag uses a straight line to draw a little bird called Cailean, who just loves taking pictures. They head off to the jungle and meet a crocodile, but he will not smile for the camera. The squiggle pad gives them a clue - the croc will not grin because his teeth are dirty, and his teeth are so sharp that no-one wants to get near to give them a clean.