Who or what is prowling the corridors of the school hostel at night?
When their roommates suddenly fall ill and are admitted to the sickbay, Emma and Janine get suspicious, especially when they are forbidden to visit them there. When they decide to investigate, the mystery deepens.
What is the headmaster doing in the laboratory in the middle of the night? And who is that man with the weird feet and strange smell?
A spine chiller mystery story for young readers.