Chloe's diamond necklace has been stolen by The Artful Dodger, and it will
be up to Kat and Mouse to find it. However, this is no ordinary middle school
mystery. To solve it, Kat must at last determine the Dodger's identity. But who
is it? Is it the scheming Mimi? The misguided Ruth? The destructive Peter?
The mysterious Mr. Templar? Or could it be someone else entirely? Whoever it
is will undoubtedly face expulsion and probably find themselves in trouble with
the law. Can Kat sentence a fellow student to such a fate? By the time this
case is solved, Dover Academy will be shaken to its very core as the mystery of
the school thief is finally solved!