Elliot Von Doppler and his friend Leslie think nothing ever happens in Bickleburgh, except inside the gleaming headquarters of DENKi-3000, the world's eighth-largest electronics factory. Beneath the glass towers and glittering skywalks, there's a rambling old mansion from which all the company's amazing inventions spring forth. And no one except Uncle Archie knows what's behind the second-to-last door at the end of the hall. Until Elliot and Leslie are invited to take a glimpse inside. They find stooped, troll-like creatures with jutting jaws and broken teeth. Tiny winged things that sparkle as they fly. And huge, hulking, hairy nonhumans (with horns). It is unlike anything they've ever seen. But when Chuck Brickweather threatens to shut down the DENKi-3000 factory if a new product isn't presented soon, the creatures know they are in danger. And when Uncle Archie vanishes, it's up to Elliot, Leslie, and every one of the unusual, er, "employees" to create an invention so astonishing it will save the Creature Department.