The building of the primary school in the little town of Wear-and-Tear has been destroyed by a tornado. The offer to move the entire school into a run-down old mansion named Hermit Manor comes at just the right time. This enormous house was until recently inhabited by a very old woman and is now empty, after she died. The children find the old building, in which only the former owner's cats still live, quite creepy, and rightly so, as it turns out: The old building seems to be haunted! Strange and inexplicable things keep happening. Johanna, Ravi, Lukas and Sylvie are determined to uncover the secret of Hermit Manor. And so, they discover Otto, the little ghost residing in Hermit Manor.
Together with this cheeky ghost, who is obviously invisible and can pull off tricks like going through walls, the children’s days at school are suddenly no longer boring at all...
