_The Beast Within_ functions as a story concerning a family grappling with a hidden darkness, with the horror elements taking a backseat. The filmmakers seemed to focus on creating an atmosphere of unease and eliciting strong performances from the cast, rather than delivering excessive gore or a clear look at what’s causing the trouble. It's probably worth seeing if you appreciate movies that take their time developing suspense, but viewers expecting uncomplicated horror might find themselves wanting something more visceral.

Source on TMDB