The ensuing murder investigation is plagued with interference from above and several false leads frustrate the investigators. But slowly they unravel the mystery and unveil a story of resentment and greed. The detective team is led by DCI. Matthew Prior and his partner, Siobhan Williams. He is a gritty and determined veteran and she his perfect counterpart. He is happily married and she, despite being physically attractive, frightens most men off with her sharp brain and wit. Despite all the hurdles put in their way they gradually get to the truth. In the process they uncover a world of deviance and cruelty rooted in the deep past.