A UFO land inside Jellystone Park and Yogi thinks it's just tourists in a fancy new car. He knocks on one of the UFO's windows looking for some food. They use a movie to film him as a sample of a typical Earthling. They decide more information is needed before they can invade Earth. One of the aliens disguises themselves to look like Yogi and returns to Jellystone. He creates all kinds of trouble that, of course, is blamed on Yogi.