With the world overtaken by a horrific plague, Paul (Joel Edgerton) has done his best to make his backwoods home a sealed-off safe haven for wife Sarah (Carmen Ejogo) and teenaged son Travis (Kelvin Harrison, Jr.). When their isolation is broken by the arrival of foraging couple Will (Christopher Abbott) and Kim (Riley Keough) and their little son, they offer the younger family shelter... but the inevitable rise of tension and paranoia in the closed quarters might doom them all, in writer/director Trey Edward Shult's understated chiller. 91 min. Widescreen; Soundtrack English.