In the summer of 1945, between the victory over Germany and the war with Japan, 10-year-old Petka from the Far Eastern village tries to save a friend dying from a mysterious illness. But the only one who can help him is the captured Japanese Hirotaro from a military camp nearby. Petka and Hirotaro will have to find a common language, trust each other and call on not only science, but even ancient spirits for help.