Beyond 'all vestiges of doubt,' concluded a classified American intelligence report, 'Okawa moved in the best circles of nationalist intrigue.' Okawa's guilt as a conspirator appeared straightforward. But on the first day of the Tokyo trial, he made headlines around the world by slapping star defendant and wartime prime minister Tojo Hideki on the head. Had Okawa lost his sanity? Or was he faking madness to avoid a grim punishment? A U.S. Army psychiatrist stationed in occupied Japan, Major Daniel Jaffe--the author's grandfather--was assigned to determine Okawa's ability to stand trial, and thus his fate. Jaffe was no stranger to madness. He had seen it his whole life: in his mother, as a boy in Brooklyn; in soldiers, on the battlefields of Europe. Now his seasoned eye faced the ultimate test. If Jaffe deemed Okawa sane, the war crimes suspect might be hanged.