Inspector Frey seems to have it all going for him, fiancée, a job he loves and some form of purpose. However this is all taken away from him when his mentor in the CID is forced out of office and his fiancée ends their engagement. Due to a chance meeting with Lord Salisbury he is posted to Edinburgh to assist in the case of a brutally murdered violinist alongside Inspector McGray.

Of course they clash from the start; Frey being used to more 'civilised' London and McGray being a firm believer in the occult as an explanation for crimes. However as the bodies mount up, they acquire a grudging respect for one another's methods and this is a very exciting and intricately plotted story and I presume the start of a series.