A fresh school year begins as Gram and Betts anxiously await the arrival of their new crop of students. But their enthusiasm is thwarted when a stranger arrives and claims to have proof that he was accepted to the school despite what is in their files. When the ghost of Gent Cylas appears, there are suddenly two mysteries demanding their attention. But as Gram and Betts start sifting through the past, one of their new students is murdered.