One night, several deer inexplicably hurl themselves against the electric fence of a farm. Discovering deep bites on the animals' bodies, the farmer and visiting family members (who have gathered for a tense reunion) penetrate deep into the surrounding forest. They carry guns, expecting to encounter wild predators, but what they are bewildered to find is an environment ravaged by a mysterious evil force. And as the sun slowly sinks away, howling resounds...

A beautiful young woman is subjected to a grueling night of terror, all accomplished in one take on one night, as she investigates paranormal reports at an abandoned mental asylum, where she is very much not alone.