October, 1901. Lawyer and private enquiries agent Karl Werthen accepts an assignment to protect the famous Irish writer Bram Stoker while on a speaking tour of Vienna. Meanwhile, his colleague, renowned criminologist Dr Hanns Gross has been called away to advise on a bizarre series of murders near his hometown of Graz, in the Austrian province of Styria. Three women have been killed with strange mutilations and scarring patterns left on their bodies...