The narrative structure of the film has two halves, with the first focusing on tragedy in the cabin to establish Sarah's mental instability so the audience does not believe her story, and the second focusing on cave exploring, survival, and horror. The first half also aims to trick audiences into thinking any horror is just hallucinations. Meanwhile, the second half spaces out horrific moments just enough to keep audiences scared without relief, using sudden appearances of creatures and screeching sounds to create jump scares.