Threatened by a killer virus, the city formerly known as London splits into two zones. On one side the safe bubble of Pure World; on the other the perils of Fleshworld. When Rich's perfect wife disappears, he has to cross to the dark side to save her. Time is running out. Has she already been soiled forever? And why did she go to Fleshworld? "Science fiction as Alfred Hitchcock might have conceived it." The Times