A village in north Wales is split over a project to turn the ruins of a castle into a tourist attraction. The argument between economists and environmentalists leads to murders and Constable Evan Evans has work to do.

Particularly under the practice in California and the Pacific states and territories.

In Wales, constable Evan Evans investigates the murder of a famous opera singer who came to the area for a rest. Suspects abound, including his wife, his lover and a dissatisfied son.