High school student Matt Donaghy is considered an okay guy. He gets good grades, writes for the school paper, and is known for his witty, if immature, humor. Students and teachers seem to like him. But one day he says something that makes a few classmates think he's out to bomb the school.

The school principal is notified, the police are called in, and rumors are abuzz. Even his buddies doubt his innocence, and none of the guys come forward in his defense. Only the school renegade, the somewhat frightening Ursula Riggs, a girl who Matt barely knows, is willing to speak up on his behalf.

But even if Ursula can help Matt clear up this misunderstanding, will life ever be the same again?