In the leafy suburb of Booterstown in the height of mid-Summer, the brutal and shocking murder of a local woman is the last thing that anyone expects. What is more unexpected is that this murder will only be the first of many. Inspector Danny O'Neill is led on a trail of false clues, lies, and corruption, where the only thing he seems to be able to find are dead ends. As O'Neill tries to come to terms with a painful past of buried memories, we realise that this is more than just a hunt for a wanted man, it is a hunt for redemption.

In a tale of twists, turns, and sometimes sheer roundabouts, Marked Off tells the tale of a Dublin rendered frighteningly unfamiliar by the antics of a troubled, abused, and evil killer.