Season 1 of Six Four premiered on March 30, 2023.

Serving police detective, Chris, is provided with a startling revelation about an infamous, unsolved case that once divided the police when a local girl called Julie Mackie disappeared. Now, reeling from the news that his own daughter has gone missing, Chris is approached by a journalist who tells him that fatal mistakes were covered-up in Julie’s disappearance. Revisiting the case, Chris uncovers a series of undeniable errors, corruption and unbridled ambition.