The main characters' plight is unexplained -- they don't seem to have done anything to "deserve" what they go through. Unfortunately, they also can't agree on the methods or approaches to deal with it, and so most of their work is for naught. But they demonstrate some definite bravery in standing up to the beast.
A simmering violence constantly threatens but rarely cuts loose onscreen -- there's actually very little physical violence, with only the tiniest hint of blood or gore. Micah and Katie argue often.
A young adult couple that lives together talks and jokes about sex fairly often. They both walk around the house in sleeping clothes, consisting of boxer shorts, T-shirts, and tank tops. A female guest shows off her bare midriff. The camera sometimes emphasizes Katie's ample cleavage. The couple has sex one time, but it happens off camera.
Very liberal use of "f--k" in all its variations, including name-calling (directed toward the invading demon). Other words include "s--t," "ass," "hell," "damn," and "Oh my God." Micah raises his middle finger, twice, in a joking manner.
Drinking, Drugs & Smoking
The couple opens a bottle of wine at dinnertime in an early scene, but we don't really see them drinking it.