The Miami and the New Orleans police investigate on deadly psychic attacks perpetrated by a secret cult, with European roots. Legitimate occult rituals and exorcisms are described. Hypnosis is also fully detailed and used too. Historical implications involve, on the positive side, the Freemasons, Benjamin Franklin and the Hermes Trimegistus sarcophagus. On the negative side, a black mass is described. The action goes from the Coconut Grove and Coral Gables neighborhoods in Miami to the city of New Orleans and the swamplands of Louisiana. The suspense is so intense that some early readers of the manuscript couldn't sleep or stop reading the book.