DI Alan Williams is faced with the most brutal murder scene he's witnessed; the ritual killing of an elderly widow. Evidence at the scene indicates that the murderer is close and the investigation runs at breakneck speed in the hunt to stop them from striking again. Meanwhile, the busy port of Holyhead is being used by unscrupulous traffickers, who are embroiled in a violent turf war. With resources stretched, DI Williams is facing a case that could break him.