In the 18th century, the citizens of Manson burned several people, thinking them to be witches, alive on top of a nearby hill. One of those witches, Lilith, swore revenge and somehow made a pact with the demon Malus. In 1965, Malus entered the body of the 10-year old girl Zoe Mann, a descendant of the witch-burning people of Manson. His task is the destruction of Manson, but secretly he has set events in motion which will destroy humankind.
After Zoe Mann had killed herself (but was ressurrected by Lilith), he jumped to Jet and later a priest. He claims that, now Zoe Mann is free of him, he will father her the anti-christ when she's a few years older.