The young Victoria remembers nothing but Kensington Palace. Arriving as a baby, she has been brought up inside its musty, mold-ridden walls. Others may see the value of Kensington's priceless artifacts and objets d'art, but the palace is a jail cell for young Victoria. Watched at all times by her mother, the controlling, German-born Victoire, and Victoire's prized advisor, the power-hungry Sir John Conroy, the bright fifteen-year-old is allowed no freedom at any time—except that which she steals or wheedles for, always in the company of Conroy's resentful daughter, Jane.

But one fateful afternoon, Victoria slips away from her mother to ride out on her beloved gelding, Prince. With reluctant Jane in tow, the princess gallops out from the palace green. But what would normally be an uneventful trot around very familiar terrain presents the mutinous princess with a most bewildering sight—a dead man, and on the grounds of the palace, no less.

Determined to get to the bottom of the inscrutable puzzle, young Victoria is met with shocking disrespect and any number of obstacles. Sir John lies to her, her uncles and aunts join with her mother to stonewall her questions and curtail her movements. But Victoria will not be deterred. With Jane Conroy as a tentative and untrustworthy ally, Victoria's first "case" is underway....