Dean Corso (Johnny Depp) specializes in tracking down rare and exotic volumes for collectors. Boris Balkan (Frank Langella) has recently acquired a seventeenth-century satanic text called The Nine Gates- a legendary book written by Satan himself. With The Nine Gates in his possession, Corso soon finds himself at the center of strange and violent goings-on. Not only is his apartment ransacked, it appears that he is being shadowed ferociously by others determined to regain the book.