Eleven-year-old Jane Grandison, who stutters, sits in the back seat of a car. In her hand she has a letter - an invitation to Sybille Joines Special School. At first glance, it seems that this is a boarding school for children with speech problems, but ghosts begin to speak within the walls of this institution, and students and teachers fearlessly explore the land of the dead. Jane, who timidly stepped onto the threshold of the school, eventually becomes the right hand of Headmistress Joines, a territory of amazing research expands, bold experiments follow one after another, but one day the measured life of the school is disrupted by a series of strange events that attract the close and unwanted attention of trustees, the police and worried parents of students. Research and even the lives of the school's inhabitants are under threat.