Herb returns to the remote planet he has been furtively trying to build a city on, to find it a swarming nightmare of self-replicating machinery. Eva has taken desperate steps to escape the tedium of her pointless life ... only to end up in the super-intelligent clutches of a yellow mechanical digger. Constantine arrives at the remote part-idyllic, part-nightmare settlement of Stonebreak and - unsettlingly - begins to confront the truth of his own unreality.Meanwhile in the farthest reaches of outer space, the Enemy is plotting the final overthrow of the human race which created it.
