Someone has pulled a huge prank at the prestigious Colgan School—the headmaster's Porsche has somehow ended up on top of a fountain.
A mysterious girl named Katarina Bishop ("Kat" for short) is about to take the fall for this prank, even though she says she didn't do it.
Kat gets called into the headmaster's office, and there, he presents her with the evidence against her: security camera footage and a record that her I.D. card was used to open the dorm doors.
Kat's defense is a smart one: "Would I really use my own I.D. if I'd done it?" (1.59) She's cleverer than that, you know.
The headmaster tries to trick Kat into confessing by asking her, "how would you have done it?" (1.62)
Unable to talk her way out of this one, Kat gets expelled. She grabs her bags and hops into a limo outside. A mysterious voice (the first of many in this book, actually) says, "It's just beginning." (1.81)