A pair of reporters try to discover the link between three unsolved, seemingly isolated murders. The only connection between them is they all took place on the same day in three successive years. The police don't trust their instincts - but as 10th July nears again, a solicitor has started receiving threatening letters...

Special Agent Dick Barton uncovers a ring of international psychopathic criminals with plans to dominate the world using a terrifying weapon of mass destruction.

The angel of the title is Jane Baxter, the wife of country physician Patrick Barr. Everybody in the small British village where she lives thinks the world of Baxter; thus, when she is murdered, the authorities are out for blood. Dr. Barr seems above suspicion, at least until he begins behaving eccentrically. As time passes, most everyone learns that Baxter wasn't quite as angelic as she seemed-and that quite a few people might have wanted her dead.