While the self-anointed Zodiac killer terrorizes residents in the Bay Area through random acts of manslaughter and cryptic messages sent for publication in the local newspapers, only a cartoonist for the San Francisco Chronicle (Jake Gyllenhaal), with occasional assistance from an alcoholic reporter (Robert Downey Jr.) and a hotshot detective (Mark Ruffalo), sees the unresolved case to its bitter end, through obsession and personal endangerment. Adapted from a book by Robert Graysmith, the featured illustrator, Zodiac is one of the most detailed films in memory, with its continual barrage of dates and case facts made all the more impressive by director David Fincher's heightened visual style and its ability to maintain a highly intense narrative thrust, these two elements coming to a head in the extraordinarily conceived basement sequence. Gyllenhaal serves as the film's center, Ruffalo is a standout playing the dogged, semi-famous detective David Toschi, and Downey Jr. finds a role suited to his personality (and not the other way around) adding a welcomed sense of humor.
