Bruce Murdoch appears infatuated by Felice Damon, an actress, but is this real, or simply because British Intelligence is interested in her? She seems interested in the latest military developments, and has to explain a virtual prisoner kept in a remote moated house in Scotland. Is she spying for 'The Ring', a group of arms manufacturers, and what of the inventor of a new material that is likely to make ships wholly invulnerable to attack? Just how far beyond Whitehall does the network stretch, and how lethal?