A woman's body is found on the English seacoast, and twisted in her hair is an article screaming murder. For Inspector Alan Grant, the case becomes a nightmare, as too many clues and too many motives arise.
There are red herrings galore, a false arrest, 2 escapes, supernatural overtones, and then an unexpected, unprepared for, and totally implausible ending. That the guilty one would have and could have perpetrated the crime in the manner indicated is just beyond belief. The author even has to make her turn out to be insane to create a strong enough motive--no, not nearly strong enough actually.
If you want to read excellent Josephine Tey, try BRAT FARRAR or THE FRANCHISE AFFAIR. This one just isn't up to her later standards.