After Karl-Heinrich, Crown Prince of Saxony-Karlsburg, obtained his university entrance degree with distinction, his uncle, the Prince of Saxony-Karlsburg, sent him to Heidelberg to study. When he arrives in Heidelberg, the Hereditary Prince is immediately recruited by the Corps Saxonia student union. He also falls in love with Käthi, the niece of the host with whom he lives and although Käthi is almost engaged, she loves him too.