Hoping to become a great singer in Germany, a young dreamer named Ernst Schrämli finds himself drawn into underhand dealings. Determined to escape a suffocating environment that annihilates any kind of creative or artistic impetus, Ernst sells information about the Swiss army to a Nazi spy by the name of August Schmid, who charms and manipulates him. When Ernst’s crime is uncovered, he is sentenced to death for espionage and treason, becoming the first Swiss citizen to be executed.