The Blue Danube: Marguerite, the beauty of an Austrian village, loves the poverty-stricken Baron Erich von Statzen, although her mother is opposed to the affair, having been made suspicious by the hunchback Ludwig, who is smitten by Marguerite's charms and insanely jealous of Statzen. Statzen's uncle would have him marry Helena Boursch, the local brewer's daughter, to save his dwindling estate. Ordered to the front when war is declared, Statzen is forced to leave without saying goodby to Marguerite.