Based on the true story of Martin Friedman-Petrásek, Broken Promise (Nedodrzaný slub) follows a Jewish teenager who, through perseverance and sheer luck, survives the Nazi occupation of Czechoslovakia that takes the lives of most of the members of his family. Along the way, he is saved from the extermination camps because he is such a good soccer player. Eventually, he escapes into the hills and joins the anti-Nazi partisans, only to discover that they too hate the Jews.