The first half is narrated by three different women who are doing an environmental impact study for a proposed quarry. They are staying in a remote cottage called Baikie’s that is used by students doing research.
Rachel is the head of the project, and she arrives to discover the body of her friend, Bella, in the barn of the nearby Black Law Farm. Bell has apparently committed suicide and left her body in a place where it would be discovered by Rachel rather than by her invalid husband, Dougie. Rachel is disturbed by this suicide, because she can’t think of a reason for it.
Anne is at the cottage to survey plant life. But she is already involved in a way that may be a conflict of interest with Godfrey Waugh, the married man who will decide whether to excavate the quarry. She is irritated by both other women, especially with Grace.
Grace is there to survey wildlife and has been reporting an astonishing number of otters, to the point where Anne is suspicious of her numbers. Grace is very quiet, sharing almost nothing of herself with her work mates, sleeping little, and hardly eating. Then Grace is found murdered nearby the cottage.
Vera, an eccentric-looking woman, begins investigating the women and the quarry deal. But she views the two women still working in the cottage as a crow trap, a cage containing a crow that is there to attract another crow. She thinks the killer will strike again.
Although this mystery spends so much time on background that some may find it a little slow moving, that is one of the features that makes it stand out. There is some information about the killer that the reader can have no way of knowing, but there are hints enough that it is possible to guess the right person. In any case, I thought this was an excellent mystery, complex and interesting. The characters seem real. The Yorkshire setting that is so evocative in the TV series isn’t vividly evoked, nor are the accents, but that’s a slight fault.