Set against the backdrop of an alternate 1985 America, where superheroes don costumes as part of everyday life, a masked vigilante named Rorschach investigates the murder of a former comrade. His quest reveals a conspiracy to eliminate and tarnish the legacies of all superheroes, both past and present. As he seeks out his retired allies—only one of whom has true abilities—they become entangled in a much darker scheme linked to their shared history, with devastating implications for the future of humanity.