Herbert Armstrong was a Welsh solicitor who murdered his wife by administering arsenic. His life was marked by love affairs and dubious business dealings. It is also probable that his hatred of his dull, respectable existence in a tiny rural village was one of the motives for his terrible crime.

This story of the crime and trial of Armstrong is told by Edgar Wallace, who reported from the courtroom. On behalf of a newspaper syndicate, Wallace offered the convicted man £5,000 for his confession. The offer was refused.