My name is Lady Grace Cavendish, and I'm Her Majesty Queen Elizabeth's favourite Maid of Honour. Everyone thinks growing up at the Royal Court is all parties and feasts and jewels - but mysterious, dangerous things always seem to happen! And because I am small and smart and very good at sneaking around, the Queen has made me her very own special secret investigator.

Last night was the Valentine's Ball, and I was supposed to pick a suitor there (boring!). But later on, one of them was found dead - with a dagger in his back! And it's up to me to solve the mystery and find the killer . . .