Scooby-Doo and Shaggy think they are abducted by aliens. Wires are hooked up to their heads on a ship and they're told that they will be released after a physical examination. They're chased around with something that looks like a Taser, and then they pass out and wake up in the desert. Another character claims that aliens experimented on him, and there's talk of cattle vanishing outside of town. Government workers draw guns but don't fire. Fred, Velma, and Daphne are caught in a net suspended over a big drop. More chases at different times: through the desert at night and with bulldozers in a cave.