It’s the first week of summer vacation. Eva can’t wait. Her best friend Sandra is coming over to go swimming, and it’s a beautiful day. What could be better? That was before her mom began working on her latest invention. She calls it The Diminisher. Eva doesn’t think much of it until there’s an accident in the basement- an explosion. Nobody is hurt, but her mother’s workshop is a mess. But that’s the least of Eva’s problems. Because Sandra’s seen too much of the strange invention. She’s curious. And when Sandra gets curious, bad things happen. They’re about to learn that the world is a dangerous place when you’re three inches tall.