A New York publisher (Bobby Darin) humors an actress/maid (Sandra Dee) who tries to pass off his apartment as her own. He plays along with the charade despite not knowing who she really is, while she tries to tidy up his place not knowing who he really is.
King Rudolf V of Ruritania is suddenly abducted just days before his coronation is to take place. Rudolf Rassendyl, the King’s distant cousin, an Englishman vacationing in a Ruritarian kingdom, is recruited to impersonate him. But King’s fiancée, Princess Flavia, is not foolish.
Loyal British knight Wilfred of Ivanhoe sets out on a mission to free the kidnapped King of England, Richard the Lionheart and then put him back on the throne while Richard’s treacherous brother enjoys ruling in his absence.