A young man, Allan Gray, arrives at a countryside inn. At the very same evening an unknown man pays him a visit and asks him for help to save a young girl who is in great danger. As it turns out the girl is the unknown man's sister. Shortly after the visit the unknown man - resident at a great manor - is murdered, and Allan Gray has to come to the young girls rescue all alone. He gives blood to a transfusion, prevents the sick woman from taking poison, sets her sister who is tied to a bed free, and finally sets out with her.
Furthermore he has succeeded in putting an end to the curse that has been upon the locality; together with the servant he has driven an iron pile into the heart of an old female vampire. The servant makes sure that her accomplice, the doctor, suffocates - in flour.