A coach from Austria races toward the French royal court on a dark, gloomy night. Inside is Marie Antoinette, bride-to-be of Louis XVI, accompanied by her twin brother, Albert. Something goes terribly amiss during their trip when walking corpses attack the carriage. Fighting tooth and nail, Albert is the sole survivor.

To keep the tentative alliance between Austria and France intact, King Louis XV agrees to let his son marry Albert in the guise of Marie Antoinette, a charade the adonrgynous young man is only too eager to participate in. Between navigating the social intrigues of the court, keeping his earth-shattering secret under wraps, and battling against the living dead, Albert plays the part of Dauphine with aplomb, though he's clearly hiding something even more devious beneath it all.