For eight teenage girls gathered together for a birthday sleepover in a canyon home, the giggles turn to shrieks when an earthquake traps them inside the house. As time passes and their supplies dwindle, their efforts at rational cooperation start giving way to panic-and surrender to their baser instincts. Disquieting female "Lord of the Flies" stars Ariela Barer, Annalise Basso, Ryan Simpkins, Odessa Adlon, Maya Hawke, Tatsumi Romano, Zora Casebere, Atheena Frizzell. 93 min. Widescreen; Soundtrack: English; alternate opening; audio commentary; deleted scenes; theatrical trailers; bonus film "Paris Window" (2018); bonus shorts "Bark" (2016), "Intervene" (2018); more.