On the day of the historic 1945 Jewel Voice Broadcast—in which Emperor Hirohito announced Japan’s surrender to the Allied forces, bringing an end to World War II—three men, flush with jubilation, made a pact. After their deaths, each year on the anniversary of the broadcast, their souls would return to the Chinese village of their younger days. It’s where they had fought—and survived—a war that shook the world and changed their own lives...