When a friendless old widow dies in the seaside town of Crythin, a young solicitor is sent by his firm to settle the estate. The lawyer finds the townspeople reluctant to talk about or go near the woman's dreary home and no one will explain or even acknowledge the menacing woman in black he keeps seeing. Ignoring the towns-people's cryptic warnings, he goes to the house where he discovers its horrible history and becomes ensnared in its even more horrible legacy.

This is a dramatisation of the true story of Major Herbert Rowse Armstrong, a solicitor and magistrate's clerk who lived in the small Welsh town of Hay-on-Wye. In 1921 he was arrested and charged with poisoning his domineering wife, Catherine, and later attempting to poison a business rival, Oswald Martin, by administering arsenic to them. At his trial, Armstrong claimed that he had bought the arsenic simply to kill the dandelions on his lawn. However he was convicted of murder and executed in 1922.

Emma Woodhouse has a rigid sense of propriety as regards matrimonial alliances. Unfortunately she insists on matchmaking for her less forceful friend, Harriet, and so causes her to come to grief. Through the sharp words of Mr. Knightley, and the example of the opinionated Mrs. Elton, someone not unlike herself, Emma's attitudes begin to soften...

Two dogs escape from a laboratory and are hunted as possible carriers of the bubonic plague.