<p><span style=color: rgba(166 166 166 1)>While on a remote island in Orkney to the north of Scotland a member of a tour group reluctantly led by a young minister is found dead in a Neolithic tomb. The police suspect the death to be the work of a serial killer who has murdered two clergymen on the same date-the summer solstice-in the last two years. The Rev. Seth Ludington and his sharp-tongued sidekick Harriet van der Berg agree at first but come to suspect otherwise and find themselves pulled into another investigation leading them into danger and the darkest moral terrain.&nbsp;</span></p>