Yuriko is happy growing up in Hiroshima when it's just her and Papa. But her aunt Kimiko and her cousin Genji are living with them now, and the family is only getting bigger with talk of a double marriage! And while things are changing at home, the world beyond their doors is even more unpredictable. World War II is coming to an end, and Japan's fate is not entirely clear, with any battle losses being hidden from its people. Yuriko is used to the sirens and air raid drills, but things start to feel more real when the neighbors who have left to fight stop coming home. When the atomic bomb hits Hiroshima, it's through Yuriko's twelve-year-old eyes that we witness the devastation and horror.