Mii and Yuko, two junior high school students are visiting Hiroshima Peace Memorial Park on a school trip when they come upon a monument dedicated to Dr. Marcel Junod standing forlornly in a corner of the park. They wonder who Dr. Junod was and what he did. Just then they are bathed in a strange light and transported back to Europe, more than 70 years before.
It is 1935. The young Dr. Junod, who has been working in a hospital in Mulhouse, France, is heading to Ethiopia as a delegate of the ICRC. Time travelers Mii and Yuko set off along Dr. Junod's path of hardship and turmoil. In Ethiopia, Dr. Junod witnesses attacks on Red Cross workers and the use of poison gas. One after another people are felled. The young doctor sees firsthand the horrors of war, but buoyed by an indomitable spirit he willingly offers a helping hand to those who are suffering as a result of the war.
Dr. Junod's work takes him from Ethiopia to Spain and across the European battlefields of World War II. He works to improve the treatment of prisoners of war and arranges prisoner exchanges. He establishes a method for prisoners and their families to write to each other. He secures routes for the delivery of relief supplies. As a humanitarian, Dr. Junod offers moral support to the weak. Seeing that, Mii and Yuko reflect on their own lives and problems.