Generate a high-contrast, black and white image depicting a classic film noir scene. The setting is a dimly lit, rain-slicked city street or alleyway from the 1940s, featuring a trench-coated figure (e.g., a detective or femme fatale) partially obscured by dramatic, elongated shadows. Emphasize chiaroscuro lighting, stark highlights, and a rich grayscale palette. The atmosphere should convey mystery, tension, and a sense of isolation characteristic of the film noir genre.