To judge the Earth, aliens grant a single man the power of wishing, but he's an everyday guy and has no idea how to handle it.
A moderately good movie, with solid comedy throughout it. I only really care about it because of its subject matter and the way it handles it. Strangely, he grants himself wisdom early on but never clues into using it to give him proper understanding of it and how to use it. That's the major theme of the movie, and the source of its comedy.