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.
| Actor | Role |
|---|---|
 Jerry VernoJim | Jim |
| RRobert HolmesCaptain Felz | Captain Felz |
| TTracy HolmesCount Huelin | Count Huelin |
| EEric PavittKing Ludwig | King Ludwig |
| PPhyllis LoringPrincess Helma | Princess Helma |
 Luli DesteCountess Zena | Countess Zena |
| HH. Saxon-SnellKarl | Karl |
| VVictor FairleyJosef | Josef |