There are strange goings-on at St. Asprey's, an expensive boys preparatory school: footsteps in passages at night ... strange lights . rabbits with battered skulls .. a face in the window ...a puppy found in a pool of blood . .. and even worse to come.

Who is the most logical choice to investigate these strange phenomena but Carolus Deene, the Senior History Master at Queen's School? In a tense, chilling atmosphere of blackmail among the blackboards when the ghostly charades prove to be only a prelude to murder Carolus has some spine-tingling experiences before he solves the mystery of the curious and sinister happenings at St. Asprey's School.