Wet, terrified, with only the companionship of trench-mates Finch and Mullet to keep him sane, Paul Jonas seems no different than any of thousands of other foot soldiers in World War I. But when he abruptly finds himself alone on an empty battlefield except for a tree that grows up into the clouds, he begins to doubt that sanity. When he climbs the tree and discovers a castle in the clouds, a woman with wings like a bird, and her terrifying giant guardian, his insanity seems confirmed. But when he awakens back in the trenches, he finds he is clutching one of the bird-woman's feathers.

In South Africa, in the middle of the twenty-first century, Irene "Renie" Sulaweyo has problems of her own. Renie is an instructor of virtual engineering whose newest student, !Xabbu, is one of the desert Bushmen, a people to whom modern technology is very alien. At home, she is a surrogate mother to her young brother, Stephen, who is obsessed with exploring the virtual parts of the world communication network—the "net"—and Renie spends what little spare time she has holding her family together. Her widowed father Long Joseph only seems interested in finding his next drink.

Like most children, Stephen is entranced by the forbidden, and although Renie has already saved him once from a disturbing virtual nightclub named Mister J's, Stephen sneaks back in. By the time Renie discovers what he has done, Stephen has fallen into a coma. The doctors cannot explain it, but Renie is certain something has happened to him online.

American Orlando Gardiner is only a little older than Renie's brother, but he is a master of several online domains, and because of a serious medical condition, spends most of his time in the online identity of Thargor, a barbarian warrior. But when in the midst of one of his adventures Orlando is given a glimpse of a golden city unlike anything else he has ever seen on the net, he is so distracted that his Thargor character is killed.