Ferdinand is an army major and son of President von Walter, a high-ranking noble in a German duke's court, while Luise Miller is the daughter of a middle-class musician. The couple fall in love with each other, but both their fathers tell them to end their affair. The President instead wants to expand his own influence by marrying Ferdinand to Lady Milford, the duke's mistress, but Ferdinand rebels against his father's plan and tries to persuade Luise to elope with him. (Summary from Wikipedia)