A serial killer in the San Francisco Bay Area taunts police with his letters and cryptic messages. We follow the investigators and reporters in this lightly fictionalized account of the true 1970s' case as they search for the murderer, becoming obsessed with the case. Based on Robert Graysmith's book, the movie's focus is the lives and careers of the detectives and newspaper people.—tom day
Between 1968 and 1983, a San Francisco cartoonist becomes an amateur detective obsessed with tracking down the Zodiac Killer, an unidentified individual who terrorizes Northern California with a killing spree.