When neurosurgeon Bradford Stone is contacted by a woman from his past, he is confronted by a baffling mystery: Why would a black civil rights lawyer want to save a convicted white racist murderer on death row? For over seventy years, Project Enduring Valour has sought the Holy Grail of combat medicine: a drug that would turn ordinary soldiers into ruthlessly efficient killers. Now Enduring Valour is ready to be implemented on a massive scale - despite devastating side effects. Stone suddenly finds himself being hunted by the Project's director, a retired war hero-turned-presidential candidate. To expose the truth, Stone must penetrate the very heart of the conspiracy before a sociopath "killing machine" permanently damaged by the drug becomes president of the United States.