Taxi driver Jim befriends Ruritanian child King Ludwig while the latter is on a visit to London. A plot is afoot by sinister forces to kidnap Ludwig, and Jim becomes caught up in the drama. After the child is abducted Jim uses all his ingenuity, including cross-dressing as a Countess and becoming involved in a car chase, to rescue him from his captors.
as Jim
as Captain Felz
as Count Huelin
as King Ludwig
as Princess Helma
as Countess Zena
as Karl
as Josef