Kate Scott, Director of Operations, suspects that the Service itself has been compromised. While ordering an internal inquiry to preserve appearances, she secretly turns to an old ally to uncover the truth.

Harry Preston, known as the Mongrel, was forced to resign from the Hall under undisclosed circumstances. Disavowed and disgraced, he remains the only man with the skills - and the nerve - to take on the mission, even if it means standing alone against the entire system.

What Preston uncovers will draw him into a web of high-level conspiracy, hired killers, and elusive hackers operating across both the physical and digital battlefields. In the shadows, one name echoes through the corridors of power - the codename of a weapon that could redefine warfare itself: MINERVA.