The mystery thriller was released on March 2, 2007. It was screened at the Cannes Film Festival on May 17, 2007. The film features Jake Gyllenhaal, Mark Ruffalo, and Robert Downey, Jr. in leading roles and Anthony Edwards, Brian Cox, Elias Koteas, Donal Logue, John Carroll Lynch, Dermot Mulroney and Chloë Sevigny as supporting cast.
Several people are murdered in San Francisco in the late 60s and early 70s by a serial killer who also sends encrypted letters to the press. The killer refers to himself as Zodiac and both the police and the reporter’s launch investigations to unveil his identity and arrest him. The killer continues his killing spree, sending cryptic letters and making creepy calls.
The film was not a success at the box office. However, it received excellent reviews for its intrigue, determination, and meticulousness. It received several nominations and won the 2007 Dublin Film Critics’ Circle Awards for Best Director and has made it to many lists of the greatest films.