A poignant, eye-opening portrait of a witness to the atomic bomb who dedicated his life to treating and advocating for radiation survivors. As a young doctor, Shuntaro Hida (1917-2017) played an essential role in the aftermath of the Hiroshima bombing, which he witnessed firsthand only six kilometers from ground zero. Tending to the overwhelming number of victims, he would spend more than sixty years developing an unparalleled understanding of the harmful effects of radiation and warning against the reckless use of nuclear power. Through intimate, thoughtful interviews and compelling reportage, Marc Petitjean has created a worthy tribute to this determined, inspiring man who stood up to complicit governments and businesses. It testifies to the power of individuals to effect change as well as the importance of collective action, as demonstrated by organizations such as Nihon Hidankyo, a survivors' group that would receive the 2024 Nobel Peace Prize.