William is scared of the place under the stairs. He is absolutely sure there's a great big and probably hungry grizzly bear lurking there. He is utterly convinced that the bear will gobble him up if he doesn't feed it, so every day he carefully opens the door, throws in some food and slams it shut quickly - wham, bang, thump! Find out what happens when a nastly smell pervades the house and Mum and William decide to investigate . . .