Ver en Cuevana. A group of female students and their lecturer, Nora, camp inside a bomb bunker to do research on the theses they are writing. After being escorted by a sinister-looking janitor, the girls prepare to spend twenty-four hours locked in the bunker. In the middle of the night, two of them disappear without a trace. Nora coordinates the search, but soon the survivors find themselves trapped in a maelstrom of violence at the hands of an anthropophagous.