A down-on-his-luck actor is paired with a weather-battered Land Rover Defender on a seemingly innocuous courier job. But some things are too good to be true, and this innocent journey quickly unfolds into a dangerous plot with a shadowy cast of characters.
The smallest mouse in London’s Royal Mews is such a little mystery that he hasn't even a name. And who were his parents? His Aunt Marigold, Head Needlemouse, sews him a uniform and sends him off to be educated at the Royal Mews Mouse Academy. There he's called "Mouse Minor" (though it's not quite a name), and he doesn't make a success of school. Soon he's running for his life, looking high and low through the grand precincts of Buckingham Palace to find out who he is and who he might become.