An assassin's guide to love & treason

When Lady Katherine's father is killed for being an illegally practicing Catholic, she discovers he was also involved in a murder plot against the reigning Queen Elizabeth I. She disguises herself as a boy and travels to London to take it one step further: kill the queen herself. She is cast in William Shakespeare's newest play, which is to be performed in front of Her Majesty. But the play is a plot to destroy the rebellion, masterminded by fellow cast-member Toby Ellis, a young spy for the queen with secrets of his own. -- adapted from jacket