Limbo is directed by Ivan Sen, best known for the films Mystery Road, Goldstone and Beneath Clouds. It also stars Natasha Wanganeen as Emma, Charlie’s surviving sister, and Nicholas Hope as Joseph, the brother of a key murder suspect.

The film was shot in the South Australian opal mining town of Coober Pedy, which stands in for the fictional town of Limbo.

Sen’s decision to film in black and white accentuates Coober Pedy’s otherworldliness, making the pockmarked desert look like a moonscape.

Collins says he can’t imagine filming the story anywhere else.

“The whole place feels like a muffled scream, which worked a lot for Charlie,” he says.