The narrative of "The Darkest Nightmare" revolves around a mysterious woman who finds herself in a dire situation after losing her memory. Her predicament intertwines with the intricate dynamics between Japan's Public Security Bureau, the FBI, and the enigmatic Black Organization. Conan, along with Ran and others, becomes inadvertently involved, striving to uncover the truth and rescue the woman from impending danger. The film's plot is meticulously crafted, delivering a seamless chain of suspenseful events that captivate viewers. The involvement of the Black Organization heightens the tension, creating a gripping atmosphere throughout. Audiences are drawn not only to the thrilling storyline but also to the psychological interplay and conflicts among the characters. The fusion of suspense and action sequences ensures the film maintains a high level of engagement, making it a compelling watch for fans of the genre.