Former Scotland Yard Inspector Steve Morgan's next case at Bristol PD involves the attempted murder of a journalist who happens to be the sister-in-law of one of his sergeants. Its prelude, though, involves a fishing trip made during a vacation when Steve and his girlfriend' father find a dead Chinese spy afloat in the North Sea. That leads to frictions with MI5 that distract from solving what should be the routine case of the woman's attempted murder. The hunt for spies and ordinary policework clash until they come together.
