Devin's in trouble. If he doesn't raise his grades by the end of the year his parents won't let him take Pepperoni the dog with him when he leaves home. During school hours one of his classmates is murdered, and the culprit is not found, how can anyone be expected to concentrate on studies when there could be a murder sitting right next to him? If he wants to spend his time concentrating during lessons he's at least going to have to know who the killer is.