At a meeting of Quenborough Borough Council, the Mayor, Sir John Assington, is accused by Alderman Trant of wasting money and turning a blind eye to speculators on the make. Then Trant is stabbed with his own knife, and while dying, manages to scratch the initials 'MA' on a piece of paper. Local Chief Constable Race is on the case. He is new to the force, so Superintendent Vorley comes to his aid. With the help of Scotland Yard, in the shape of Inspector Lott, they each bring a different approach to the investigation. For the truth is rarely straightforward . . .

Sir Herbert Sterron is found dead, hanging by the neck from a curtain cord. He had good reason to want to kill himself, so nobody is unduly surprised. But then hints of foul play start to emerge: Sterron's wife, Griselda, was desperately unhappy with the marriage; and shocking evidence is uncovered that incriminates not just the County Sheriff but a Catholic priest. Now what looked to be a straightforward suicide is turning into something quite different - a complex case of murder . . .