the first half of the film is basically a terrifying sport film about a caving trip gone wrong and quickly becomes something else out of nowhere. also stars entirely women which is cool, mostly passes the bechdel test. neat fact the whole film was filmed in one big cave room from different angles.
i recently learned there were 2 endings so make sure when you watch it that the ending is fucke dup as hell, if it's not you probablyh saw the wrong one