A family suddenly sealed inside their home must work together to survive against dwindling resources and the ominous threat keeping them trapped.

When an ex-cop named Fallon returns to the scene of a horrific crime, the residents of a rural town soon discover that this dark visitor is really a vampire who feeds on blood and fear. After he is befriended by a kind immigrant family, the instinctive killer is faced with a choice between revenge and redemption.