The narrative follows newspaper staff and police detectives—primarily Robert Graysmith (Jake Gyllenhaal), Dave Toschi (Mark Ruffalo), and Paul Avery (Robert Downey Jr.)—as they pursue leads, analyze letters and ciphers, and confront bureaucratic dead ends, with no alterations to historical figures or addition of contemporary framing. Casting aligns precisely with the actual individuals involved, preserving the factual record without any imposed identity-based revisions. The film's themes remain confined to procedural investigation, media sensationalism, and the mechanics of an unsolved case, delivering a pure focus on evidence gathering and institutional obstacles.

No subplots, dialogue, or creator statements introduce elements such as systemic oppression, DEI initiatives, or related activism, allowing the story to stand on its historical merits alone. This absence of ideological overlay results in a clean, uncompromised portrayal that prioritizes factual recounting over modern messaging.