Young geneticist Max Flemming may be brilliant enough to have created the world's first cloning machine, but when it comes to women, he's a moron. So when he accidentally clones the girl of his dreams, he seizes the opportunity to create what he feels will be the perfect woman - one who acts just like a guy. He has his Henry train the beautiful but uneducated Repli-Kate in the "finer" things in life, such as pizzas, sports, beer, and, of course, sex. All hell breaks loose, however, when the original Kate returns to work with them in the lab, setting up a series of mistaken identities, close calls and major complications.