Chaos, wizardry and a gang of kind-of ghosts are the stars of this hilarious adventure. Noah's mum's new invention can zap ANYTHING into a ghost of its former self. It's still there, but you can't see it and you can't touch it. When sinister 'Seerblight Solutions' steal her invention, Noah himself is zapped—and he's not the first to have been turned 'invisible' through the ages. The world is in terrible danger. But with a medieval knight, a Victorian inventor, a poetic pony, an ordinary boy and, of course, Invisible Inc.—they can save the world.