Ignatius Blackward man of God, Ignatius travels the world, combating Evil. As a result, he is an expert on foreign languages, cabalistic writings, occult rituals, and shamanism. Urgently summoned by a parish in Chelsea, Ignatius returns to London. There, he listens to hysterical reports of missing parishioners and monster sightings. Some insist these events result from excavations at the St. Catherine Docks, which burned in the Great Fire of 1666. Later that same evening, a mysterious manuscript appears on Ignatius' doorstep. He deciphers the author, Samuel Pepys, the date, 1666, and what appear to be records of The Brotherhood of Hecate. An entry about an arcane formula for animating lifeless matter, alarms Ignatius. So he posts the diary to Dr. Jean Franciscus in New Orleans.

Nadia Franciscusadia returns from gymnastics practice to find Ignatius kneeling by her father's body. When she demands an explanation, Ignatius repeats Jean's dying words. Nadia vows revenge against her father's murderer and his nefarious Brotherhood. Ignatius swears to help her. In the recieving line at her father's funeral, a stranger hands Nadia this note, "Know about AC. HVHJ"

Adam Crowley ormerly a legitimate scientist, Adam Crowley now masterminds the Brotherhood of Hecate. The discoverer of Pepys’ diary, Crowley wants to the use its formula to create "Supermen" and rule the world. To this end, Crowley enlists businessmen, bankers, doctors, and others to finance and participate in his mad schemes. So far, their experiments only produce monsters. Belatedly, members of the secret society want to stop Crowley, but they all fear for their lives. The society’s Secretary, Henry Victor Holy Jail, finally takes action. He steals the diary, leaves it at Ignatius’ door, and later gives Nadia a note. Adam Crowley is Dr. F.’s assassin. Ignatius and Nadia must track Crowley down and stop him, or London becomes a city of Nightmare Creatures.

Dr Jean Franciscus prominent historian and expert on secret societies, Dr. Jean F. receives Pepys diary with great elation. Immediately, the good doctor and his daughter, Nadia, embark on a voyage across the Atlantic. Once in London, Dr. F. contacts Ignatius, and begins inquiries about the Brotherhood of Hecate. One day, Ignatius gets a strong urge to visit Jean at his hotel. There, Ignatius finds the mortally wounded Jean, who gasps, "Murder. Adam Crowley. Brotherhood of..." The diary is missing.

Samuel Pepys, (1633-1703) amuel Pepys is one of the most reknowned writers in English history, his diaries are prized by historians today as they contained information on many aspects of life in the 17th Century, also his were some of the most in depth and first hand accounts of the Plague and Great Fire of London, he did much travelling in his life and was associated with many groups and communities, and to those who knew him this must have scared them as many odd whispers are about Samuel Pepys, the main ones being of how he informed King Charles II of the Plague, before it was discovered or anyone was taken ill, and also how he informed the King of the Great Fire... before it happened... People say that one of his diaries was never found...