Mr. Ducháček runs the law firm of JUDr. Faukner in a peculiar but completely devoted manner, which manages the financial affairs of the Rispaldic family. The family members treat their lawyer Faukner with condescension, except for their daughter Julia, who secretly loves him. However, no one except Ducháček knows that the squandering family no longer has any money and that JUDr. Faukner is subsidizing it, because he is also secretly in love with Julia.
Toni Le Brun, a beautiful Viennese singer, becomes the ward of the wardrobe mistress of a Monte Carlo nightclub. Her benefactor, however, is actually a baroness incognito. Toni falls in love with the handsome Richard, but as they prepare to marry, she comes to believe he is only after the wealth accompanying her new noble status. But truth, like true love, will not be kept secret long.
Vienna, 1951. Ferdinand Godai is a professor of operetta at the Academy. Disguised as a porter for a costume party, he ends up in a drunken mood at the South Station. There he meets Anton Lischka, a genuine Viennese porter with a fiery temper, who asks him for his collegial help. Ferdinand falls in love with the sweet Gabi, who turns out to be a new colleague at the Academy. A series of adverse circumstances force him to continue his complicated double life as a fake porter and a genuine professor. Lischka, who becomes increasingly annoyed by his "colleague's" clumsiness, is also drawn into the confusion. Only Gabi sees through the deception and even contributes to its escalation in order to teach her beloved professor-porter a lesson in womanizing.
