In the wake of the Rapture, a devout religious enclave has forsworn the “sin of speech,” living a wordless existence in relative isolation. (Their whistling, however, does feel a bit like cheating at times.) When a young woman the credits tell us is named Azrael (Samara Weaving, Ready or Not) is set to be sacrificed to zombie-like creatures that inhabit the woods, she attempts to escape with her lover (Nathan Stewart-Jarrett, Candyman) and must fight to avoid being torn limb from limb.