Dean Corso (Johnny Depp), a New York City rare book dealer, makes his living conning people into selling him valuable antique books for a low price, and then re-selling them to private collectors. Corso meets with wealthy book collector Boris Balkan (Frank Langella), who has recently acquired a copy of ''The Nine Gates of the Kingdom of Shadows'' by 17th-century author Aristide Torchia, one of only three extant copies. The author adapted the book from one written by the Devil himself, and was burned for heresy. "The Nine Gates" purportedly contains the means to summon the Devil and acquire invincibility and immortality. Balkan believes two of the three copies are forgeries. He hires Corso to check all three and acquire the legitimate one by any means necessary.