Keith has the best set of teeth in the whole town, but he has lost two of them after colliding head-on with another boy. Not to worry, though, as his teeth have been found. But are they really his teeth? They are making him steal and eat every biscuit, sweet and bar of chocolate he can lay hands on, and he is growing. This is not normal growth, however; he is becoming huge and is becoming a menace. He needs to be stopped - but where is Mighty Pete? Pete's parents are sitting with him in hospital, where he is lying unconscious.