It was Christmas, 1971, and unlucky Clara (Georgia Acken) and Samantha (Madison Baines) found themselves stranded by family at their posh girls' boarding school. The stay would prove anything but dull, courtesy of unexpected company-a quartet of demonically-inspired thrill killers (Mena Massoud, Olivia Scott Welch, Derek Johns, Laurent Pitre) that had been terrorizing the community. The evening won't proceed as any has planned, in this seasonal stunner; Chloë Levine co-stars. 99 min. Widescreen; Soundtrack: English; audio commentary; featurettes; image gallery; theatrical trailer.