Billy can't wait to start frog dissections at school. It'll be so slimy and gross! But his rowdy behavior earns him a boring alternate lab assignment instead. Now he's out for revenge against the science teacher, spooky Ms. Wilson, with plans to leave a "witches' stew" of half dissected amphibians on her desk. But when he sneaks into the classroom at night, something moves. Then it croaks. The frogs have come back to life!