London, 1918. Billy Prior is working for Intelligence in the Ministry of Munitions. But his private encounters with women and men – pacifists, objectors, homosexuals – conflict with his duties as a soldier, and it is not long before his sense of himself fragments and breaks down. 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 wish him to be ... The Eye in the Door is a heart-rending study of the contradictions of war and of those forced to live through it.