In an alternate 1985, the United States won the Vietnam War, Nixon remains in power, and the masked superheroes, once glorious, have been outlawed by the government. When one of those retired vigilantes is murdered, the relentless Rorschach begins to investigate and suspects that someone is eliminating the former crime-fighters one by one. His inquiry uncovers a conspiracy that, with the Cold War on the brink of nuclear abyss, threatens the future of all humanity. Zack Snyder adapts Alan Moore's acclaimed graphic novel into a dark, adult and visually overwhelming superhero thriller that dismantles the genre's myths.