Publisher's Synopsis
As part of the research for her new novel, Clio Marsh joins a survival-training course based on the Norfolk Broads. Expecting to be an observer, she's unprepared for the punishing boot-camp regime. Most of her fellow trainees fair little better and within days, several have succumbed to a mysterious illness. Their symptoms closely resemble the "marsh fever" talked of in ominous tones by the locals of Graveleigh. The nearest neighbour of this isolated village is Growth Industries, a chemical plant with a sinister reputation. When Clio and her companions seek refuge at G.I.'s headquarters, after a training exercise goes badly wrong, they are treated to a less than warm welcome - and find themselves plunged into a nightmare.
