A twelve-year-old's intergalactic friend Dandelion helps his engineer father repair a space probe to Uranus and provides the rest of the family with a space adventure.

Having rescued many stranded "tourists" from outer space, Walter and his friend Kathy are unprepared for the evil aliens they encounter in an abandoned house and the strange cat with unusual powers that comes to their rescue.

Describes the artistic uses of computers, as opposed to technological, in areas such as creative writing, visual arts, music, movies, television, theater, and video games.