Lee Monkhouse takes a job as a tutor at a boys' school but all is not as it seems. The headmaster appears to be hiding something, while one of the other tutors, Theophilus St. James, terrorises the students...

Vicky's friend Frances Norton is dumbfounded when her beloved fiancée Manuel Lana calls off their engagement without notice. Shortly after, he is found dead in his surgery, and Inspector Lavender’s suspicions falls on Frances' brother Arthur.