The setting is 1874 Vienna. Things have been set in motion before the curtain rises on Die Fledermaus, that most effervescent of operettas. The recipient of a practical joke while in a drunken haze after a college party, it has taken young Dr. Falke three years to figure out how to get back at his friend Eisenstein for the prank. The perfect forum is provided by the outlandish Russian Prince Orlofsky, who rolls into town and invites Falke to a sumptuous party on New Year’s Eve. The guests arrive under an assortment of false pretenses, culminating in the unwitting Eisenstein flirting shamelessly with his own wife in disguise as a Hungarian countess. Amidst much waltzing and champagne consumption, he gets a taste of his own medicine, delivered in large doses by Dr. Falke.