The film noir genre emerged in America after the Great Depression with a visual style reminiscent of German Expressionist cinematography. This reflects the general feeling of pessimism, cynicism and dark confusion of the time. He became widely known for his psychologically expressive approach to visual composition and his many definitive stylistic elements. The use of dark, white lighting, a morally ambiguous protagonist, loose plotting, a corrupt authority figure, and a femme fatale character were among its defining characteristics. Neo noir, a subgenre of the classic definition, uses the fundamental elements of film noir but with evolved characteristics better suited to contemporary society, particularly in the face of technological advancements. Christopher Nolan's neo-noir psychological thriller Memento (2000) encompasses many of the well-known characteristics of classic film noir in a unique way. Its form, its narration, its cinematography and its staging show its undeniable place among modern neo-noir films. It tells the story of Leonard (Guy Pearce), a distressed man searching for his wife's killer, the same person responsible for his short-term memory loss, leaving him frozen in time. Although he cannot create new memories, he attempts revenge for his wife's murder using keepsakes he leaves for himself, including Polaroids with notes scribbled in the margins and tattoos covering his body. Among his notes are important people he meets, including Teddy (Joe Pantoliano), the corrupt cop, and Natalie (Carrie-Anne Moss), the femme fatale with suspicious motives. The film's use of neo noir conventions is evident from the start. scene. It opens with a man unfolding a Polaroid. In the photo, a body posed face down in the middle of a sheet of paper allows the viewer to wholeheartedly share in Leonard's every experience and emotion and work until the very last scene to piece together the entire complex. puzzle together. This work speaks volumes about the capacity of cinema – not only what can be represented but also what can be removed. Every viewer undoubtedly comes away feeling the same rage, confusion, and helplessness that Leonard felt with each moment trapped in time. Even when he accomplishes what he has worked so desperately for: finding his wife's killer, he realizes that he will never have the satisfaction of feeling like his death has been avenged because a few moments later later, she disappeared. In an almost tragic ending to a story doomed from the beginning, Leonard's life becomes a search for his wife's killer because that's all he has left. His last memory has become who he is: a man eternally seeking revenge that he will never obtain..