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''The Ninth Gate'' is a 1999 movie by Creator/RomanPolanski, freely adapted from ''Literature/TheClubDumas'' by Arturo Pérez-Reverte, starring JohnnyDepp as Dean Corso, an expert on rare books. A client, Boris Balkan, played by Franck Langella, asks Corso to authenticate his copy of ''The Nine Gates of the Kingdom of Shadows''. The book has three copies surviving, due to the rest being burned in 1666 along with its author - because the book is supposedly an adaptation of another book, the ''Delomelanicon'', written by Lucifer himself.

As Corso attempts to figure out which of the three copies is the genuine one, he discovers that the ''Nine Gates'' has a purpose - when used correctly, the book will raise the Devil himself and grant the summoner great supernatural power. Corso is not the only person who has figured this out, and is chased by others who want the power and protected by a mysterious [[NoNameGiven Girl]], played by [[Film/{{Frantic}} Emmanuelle Seigner]]. The deeper Corso delves into the mystery of the book, the deeper the pile of bodies left behind becomes.

That, of course, is the movie. In the book, Corso has two missions. One is to try and authenticate his client, Vara Borja's, copy of "The Nine Gates of the Kingdom of Shadows." The other involves "The Anjou Wine", a chapter of the original manuscript of ''Literature/TheThreeMusketeers'' by Creator/AlexandreDumas, père. This manuscript was once owned by the late Enrique Talliefer, a millionaire who specialized in cookbooks, who killed himself. While traveling around Europe on his mission(s), he finds himself being stalked by a man and woman who look uncannily like Milady de Winter and Comte de Rochefort.

What do these two strangers want with him and what is the connection between Literature/TheThreeMusketeers and the Devil?

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!!This film provides examples of:

* AdaptationalAttractiveness: Corso, in the book described as rather unattractive, is played by Johnny Depp.
* AdaptationDistillation: The movie removes several subplots from the novel, combines numerous characters and changes the ending.
* AncientConspiracy: The Order of the Silver Serpent probably like to think of themselves as this.
* BlondGuysAreEvil: Liana Telfer's main henchman in the movie is a [[DarkSkinnedBlond bleach-blonde black man.]]
* {{Catchphrase}}: In the movie, when Corso tries to corner the Girl, she often answers "If you say so."
* CompositeCharacter: [[spoiler: The film's Balkan is a composite of the book Balkan and another character, Varo Borja. Also, the film's Andrew Telfer is a composite of Enrique Talliefer and Gualterio Terral.]]
* CulturalTranslation
* DealWithTheDevil: The goal of most characters in the film is to summon Lucifer and obtain unknown power. This seems to eventually happen in some capacity and, depending on your point of view, has surprisingly little negative consequence. [[spoiler: Just a few dead bodies, really, including a pseudo-friend. But hey, you get laid by attractive women. Twice!]]
* DeathByAdaptation: [[spoiler: Bernie the bookshop owner is killed early on. His book counterpart, Flavio la Ponte, is a major supporting character and stays very much alive. Also Liana Telfer and Boris Balkan, although [[CompositeCharacter it's not really the same character as in the book.]]]]
* EverybodySmokes: And they do it everywhere, as there is not a "No Smoking" sign in sight.
* FadeToWhite: The ending.
* HiddenInPlainSight: The last of the engravings in "The Ninth Gate" is hidden in what, in hindsight, is an extremely obvious spot. "If this is a forgery or a copy with missing pages restored, it's the work of a master," says the master bookbinder.
* HotAsHell: [[spoiler: The Girl, who makes the Devil look GOOD. Doubtless intentional.]]
* ImpoverishedPatrician: Both Victor Fargas, the Portuguese owner of the second copy, and [[spoiler: Liana Telfer, who had to marry Andrew Telfer in order to save her ruined French aristocrat family.]]
* LouisCypher: Signed [[FunWithAcronyms LCF]].
* MindScrew: The ending.
* NoNameGiven: The Girl.
* NumberOfTheBeast: Balkan has the largest collection in the world of books about the Devil. Guess what the password to his library is? Also, the author of the book he's seeking, which reputedly is capable of summoning the Devil, was burned along with all of his works in 1''666''.
* ProductPlacement: Several examples, but most notably when Corso is getting gas, he deliberately twists the nozzle so the Shell logo directly faces the camera.
* TheReasonYouSuckSpeech: Balkan gives one [[spoiler: to Liana and her followers.]]
* ShownTheirWork: The Ceniza Brothers tell Corso that the difficulty of forging or restoring an antique book is so difficult and costly it wouldn't be profitable. Even with modern technology, forging old books well enough to fool the types of collectors and historians who will be interested in buying them is very tricky, needing the right types of paper and ink even. And if you aim to forge one so rare and desired that the price they'll pay is enough to make it profitable, it just increases the chances that someone who knows about that book will investigate and find out that it's a fake.
* SidekickExMachina: The Girl, who is always there just in time to extricate or save Corso.
* StartsWithASuicide: The film begins with Andrew Telfer hanging himself in his library.
* TarotMotifs: The film includes many examples of Tarot imagery.
** The Hanged Man - Corso's friend is killed in this manner.
** The Tower - [[spoiler: Balkan's]] death occurs by fire, in a tower, after a lot of pride.
** The Magician - Boris Balkan.
** The High Priestess - Baroness Kessler or Liana Telfer.
** The Empress - Liana Telfer.
** Death - Fargas.
** The Hermit - Fargas.
** The Fool - Corso.
* TitleDrop: Even though "''The Nine Gates etc...''" are often referred to, you need to wait for the end, to hear Balkan mention "unlocking ''Film/{{The Ninth Gate}}''" during his ceremony.
* UnusualEuphemism: At one point, Liana tells Corso "don't fuck with me," to which he responds, "I thought I just did." The TV Edit changes "fuck" to "mess" making Corso's response unintentionally bizarre.
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