Bizarre events disturb the quietude of Gatestown; in fact, something extraordinary is happening to the entire world. There are widespread computer problems; 'poltergeist' phenomena; strange deaths; hyperspace effects; sudden floods; suspected alien invasion; and, in particular, NASA's computers have frozen with hieroglyphics on the screens, incomprehensible to the experts. The puzzle slowly unfolds throughout the story and is essentially solved by a teenage computer wizard named Alvin. Is this an alien invasion or is it a gigantic error by an extraterrestrial civilisation and Earth has haplessly become a victim? The story is based on mainly valid science but is not too technical for the layman. In fact, the Intergalactic Travel Project that is revealed could be achieved practically.