London, 1918. Billy Prior works for Intelligence in the Ministry of Munitions. But his private encounters with women and men, pacifists, objectors and homosexuals conflict with his duties as a soldier, and before long his sense of himself fragments. Forced to consult the man who helped him before - army psychiatrist William Rivers - Prior must confront his inability to be the dutiful soldier his superiors require him to be...The second book in the Regeneration series.