Aristocrat Julian Markham keeps his disfigured brother, Sir Edward, locked in a tower of his house. Occasionaly Sir Edward escapes and causes havoc around the town.

Scotland Yard must discover why people are being murdered by a monstrous dog at Blackwood Castle.

In London, a serial-killer drains the blood of females and the Detective Superintendent Bellaver and his team are hunting down the so-called Vampire Killer. Meanwhile in an undefined country that lives a military dictatorship, the cruel Konratz is climbing positions killing The Power that Be. When the Vampire Killer flees from the police, he seeks refugee at the real estate of scientist Dr. Browning and jumps into a tank of acid. Dr. David Sorel is intrigued with the powerful acid and decides to get a sample. He finds the truth about the research of Dr. Browning. Written by Claudio Carvalho, Rio de Janeiro, Brazil