Werewolves and Vampires have always fought against each other, however in 1911 the conflict became bigger. Vampires and Werewolves started a war against each other. This war took place for seven years until Hal and Lady Catherine meet up together. They have both realised that someone else was using them. Hal found out that The Devil was behind this. He told Lady Catherine that when werewolves and vampires weren't fighting against each other. They were fighting against the devil. Furthermore the devil feeds through the conflict between them. He gets stronger and stronger. So Hal and Lady Catherine decided to end the war and  destroy the devil. Together with the ghost of the necromancer Emil Parsons they form a supernatural trinity and perform a spell. However the spell goes wrong and the devil is trapped inside a human body.