Sarah and Daniel are jews, and they are hiding in the basement of Otto and Gerda’s family, before they are heading for Sweden. But they have now been discovered, the parents are arrested, before they continue the voyage in the depiction of fear, confidence, friendship and great courage in small people.
(https://www.nfi.no/eng/news/2018/norwegian-film-institute-will-support-childrens-ww2-classic)