Police Detective Frank Herriot has attacked a member of Parliament and otherwise behaves strangely. His brother Drew and estranged wife Anne try to understand with the help of a psychiatrist, but he is soon murdered.
Drew,Anne and Val search for answers to why a mysterious brass rubbing of a medieval knight was mailed from a small seaside town. They find the place overrun with bikers and young thugs, and the local vicar strangely complacent.
Drew is inexplicably on a client list of a murdered call girl, and is put through some high-pressure questioning, and is identified by a girl he's never seen. Anne goes under cover at a shady employment agency.
An old IRA fighter is invited to London to dedicate a statue of a deceased British Army foe. The unlikely request is answered positively, to the shock of his elderly comrades in arms, who bitterly oppose his willing involvement.
In a run down hotel, a stockbroker receives tips from a man who claims he can foretell the future, including the death of "someone famous" in front of many people. Herriot tries to stop it, and nearly dies himself.
The Underminds gain control over a popular children's story writer, and slowly, her cartoon and puppet creation,"Zoomer", is joined by a monstrous fish-like character, "Mulagatawny" that that tell terrible stories that upset children's innocence and beliefs, such as where Father Christmas tries to kill them. The whole thing explodes when against her will, she devises a puppet performance where Zoomer himself is murdered, leaving her career ruined and her reputation disgraced.