Violet Holmes is not an ordinary teenager because, well, nothing is ordinary when you're the adopted daughter of the great Sherlock Holmes. Having been home schooled for her entire life she has decided to take the plunge, at 14, and attend Bardle Secondary School to study for her exams. But after a week, she notices that the school hides a deep secret, and she's determined to crack it wide open. Are the current spate of school thefts the work of criminal masterminds? Is there really a secret society behind closed doors? Can a girl like Violet make friends and fit in?