|Nicholas Rowe||Sherlock Holmes|
|Alan Cox||John Watson|
|Sophie Ward||Elizabeth Hardy|
|Susan Fleetwood||Mrs. Dribb|
|Michael Hordern||Older Watson|
A teenage Sherlock Holmes meets and befriends his future sidekick, the bemused and bespectacled John Watson . During their first semester of boarding school, a series of deaths occur on campus. Intrigued by the crime, Holmes looks into it and soon comes to suspect a poisonous hallucinogen. And then, in the midst of their investigation, Holmes and Watson stumble on a bizarre cult with a penchant for human sacrifice -- after which they must struggle to escape.