Henrick van Schwaffle receives an anonymous letter one day which grabs his interest as an occult researcher. In it is described a haunted manor, and when he visits it he finds more than a scientific interest in the ghost maid inhabiting it.
Henrick receives a request for help from Doctor Louis Russell, a staunch non-believer of Henrick's work, after his housekeeper left and pest exterminators reccomended calling Henrick after they were attacked by a mysterious creature.
Henrick and Theresa take a break from the city and the presentation of her ghost existence and stay at a quiet little village in the country. Their rest is soon cut short when young women are attacked by some beast in the night.