After years of investigation, arrests and painstaking evidence-gathering, lead detective Jason Murphy is ready to make his boldest move yet. Convinced that those responsible for Lyra's murder reach far beyond the gunman, Murphy targets the figures who he believes sit at the heart of the organisation behind the attack. With unprecedented access to never-before-seen tactical operations, cameras capture the high-stakes effort to turn years of intelligence and evidence into charges. Murphy's team execute a series of coordinated arrests but are faced with a wall of silence. The investigation gathers momentum with a gripping and emotional finale to an extraordinary seven-year investigation