High up on the ceiling, Squash the Spider is waiting to pounce! He watches as Billy comes in the TV room and sits down to eat his supper - "BOO!" shouts Squash and makes Billy jump! Where will Squash turn up next? In Billy's sandwich? In the middle of his teacher's storybook? In someone's crisp packet? Will Billy and Squash finally make friends? Or will one of Squash's practical jokes end in disaster?