Everyone in school is in a state of shock. Mark, my best friend Mary's boyfriend, has been found dead and nobody knows how he died. Rumors are flying like wildfire at school and nobody trusts anybody. I'm not even sure I can believe my best friend Mary, who says she doesn't know anything about Mark's death - yet has lied about where she was when he died. And Tony, my ex-boyfriend, is always with his silly new girlfriend, but is suddenly taking a big interest in every move I make...And now someone has left a note taped to my locker that says: THIS IS YOUR LAST WARNING. STOP ASKING QUESTIONS!