The Millenium Murderer

In an open field on the edge of the Vienna Woods, a car burns out. The police discover the remains of a body inside the vehicle, around which a symbol has been carved into the earth. This unusual discovery presents Chief Inspector Eisner and his team of investigators with a baffling puzzle. The victim was the owner of a peep show. Is this ritualistic tableau the work of a psychopath, or is a killer from Vienna's pornographic underworld using this scenario to divert attention from their true motive?