How to Save Us (2015)

Brian's younger brother Sam goes missing in Tasmania during the middle of a mysterious quarantine. Brian must travel to the deserted island to save his brother from a land now solely inhabited by demonic spirits. In order to survive, he must follow a set of rules: including covering himself with human ashes, to cloak his presence from the malevolent entities haunting the barren landscape. But will this buy enough time for Brian to find his brother, or will they both be stuck in a hellish realm of the dead forever?