Luther must rescue Ripley, abducted by Cameron, in time to prevent Cameron's final murderous set piece. But Jenny's ruthless and vengeful boss is demanding compensation for stealing her property. Luther is torn; will his visionary mind provide the team with the tools to save Ripley and the killer's intended victims, or will his focus be compromised?

Luther's personal and professional life spirals out of control as he tries to cover up Toby's death and appease a suspicious Baba. He must also protect Jenny from any further harm. At work there's also a killer at large whose actions are ruled by his dice. How do you stop a man who sees life and death as a game and whose actions can't be predicted?