In “The Adventure of the Priory School”, the distraught head of an elite boarding school hires Holmes and Watson to investigate the sensitive disappearance of the young heir of a local nobleman. Searching the fields surrounding the school they make a grisly discovery—the dead body of one of the boy’s teachers. Sensing the growing danger to the young boy and suspecting the interference of the Duke’s secretary, Holmes and Watson question the Duke himself, who reveals a shocking detail to them.