The world is outraged when journalist Lyra McKee is murdered. Senior Investigating Officer Jason Murphy and his team's search for a single gunman grows into something much bigger.

Officers have a name for the masked figure at the heart of the case. Lead detective Murphy and his team launch a series of high-risk operations targeting the suspects. The stakes are immense.

After years of investigation, lead detective Jason Murphy and his team execute a series of daring arrests. The pursuit gathers momentum, leading to a tense and emotional climax.