In an alternate 1985 where former superheroes exist, the murder of a colleague sends active vigilante Rorschach into his own sprawling investigation, uncovering something that could completely change the course of history as we know it. In a gritty and alternate 1985 the glory days of costumed vigilantes have been brought to a close by a government crackdown, but after one of the masked veterans is brutally murdered an investigation into the killer is initiated. The reunited heroes set out to prevent their own destruction, but in doing so discover a deeper and far more diabolical plot.