It starts with the most quietly devastating premise in the park: two girls on a school trip stop at a monument nobody else is looking at, and have to ask who this man was. Mii and Yuko get pulled back to 1935, and instead of spectacle you get a young hospital doctor from Mulhouse accepting an ICRC posting to Ethiopia, which is exactly how real courage actually starts, as a paperwork decision. There is no soaring score telling you to feel things, no dramatic camera pushes, just a man saying yes to the next terrible place. That restraint is the whole trick, because when the weight lands you have nothing to brace against. It respects Marcel Junod enough not to turn him into a hero cartoon, and it respects you enough to let the monument stay small in the corner. Then you look him up afterward, which is the point.

Two junior high students, Mii and Yuko, stumble upon a forgotten monument in Hiroshima's peace park and become curious about the man it honors. A sudden burst of light carries them back to 1935 Europe, where the young Swiss physician Marcel Junod leaves his hospital post in Mulhouse to serve as a Red Cross delegate in Ethiopia. The girls follow his path as he sees Red Cross workers come under attack and poison gas used, and he keeps helping those who suffer. His work then takes him to Spain and across the battlefields of World War II, where he pushes for better treatment of prisoners of war, arranges exchanges, sets up a way for prisoners and families to correspond, and opens routes for relief supplies. Watching him support the vulnerable, Mii and Yuko begin to reflect on their own lives and troubles. The drama film tells the story of the man remembered in Japan for bringing medical aid to Hiroshima after the atomic bombing.