This incredibly meta story isn’t strictly about the Zodiac Killer, but rather a failed attempt to make a documentary. After director Charlie Shackleton lost the rights to adapt the book The Zodiac Killer Cover-Up, he decided to make a movie that shows what the film would have been like. It plays out like an extended director’s commentary for a movie that doesn’t actually exist. The result is a surprisingly compelling story on its own, but also one that serves as a clever deconstruction of true crime, and a very open look at the editorial decisions that shape the genre.