The Mystery Machine is driving through a desert in Roswell, New Mexico. A sandstorm comes up and Shaggy Rogers makes a wrong turn onto government property. Seeing a unidentified flying object causes Shaggy to lose control of the vehicle and the gang find themselves on the outskirts of a small town. While Scooby-Doo (character) and Shaggy stay with the van, the rest of the gang enters a local diner to get directions. Shaggy and Scooby then see a mythical animal called a jackalope. The jackalope takes their last Scooby Snack and they chase it into a cave, where they encounter aliens. They run into the diner in panic, claiming to have seen Extraterrestrial life.