"The Book of the Nine Gates" is a 1993 film directed by Roman Polanski. It follows a rare book dealer named Dean Corso, played by Johnny Depp, who is hired to authenticate a mysterious book that is said to summon the devil. The book, known as the Nine Gates of the Kingdom of Shadows, is believed to have been written by Lucifer himself, and Corso's journey leads him into a world of intrigue and danger. As Corso investigates, he encounters various characters, including a wealthy collector and a mysterious woman, who all have their own motives. The film explores themes of obsession, the occult, and the nature of evil, culminating in a suspenseful and ambiguous conclusion that leaves viewers questioning the true power of the book.