A cosmic case of UFOs, intergalactic intrigue and out-of-this-world romance launches Scooby, Shaggy and the Mystery, Inc. kids into their most unearthly adventure ever! Stranded in a remote desert town, the gang soon discovers the place is crawling with flying saucer buffs, secretive scientists... and less-than-friendly extraterrestrials! Then, after being chased by aliens and beamed aboard a UFO, something even weirder happens to Shaggy and Scooby-- they fall head-over-heels in love!