The filmmaker Aya Domenig is of Japanese-Swiss origin and intended to trace the life of her grandfather – after the atomic bombing of Hiroshima by the United States Army Air Force on August 6th, 1945 – Shigeru Doi worked as a doctor in a Red Cross hospital in Hiroshima, and the filmmaker tries to find closer to him. Aya Domenig meets Chizuko Uchida (born 1923), a former nurse, her grandmother and Shuntaro Hida (1917-2017), a doctor, the second "Hibakusha" (被爆者) who is portrayed in the documentary film – they have a similar fate as the filmmaker's grandfather who throughout his life never spoke about what he had experienced. While researching her film in Hiroshima, on March 11th, 2011, the Fukushima Daiichi nuclear disaster occurs, and the film-maker's intention takes a turn.