Watch at FMovies. A vicious murderer is on the loose and the entire city is on edge. It's the perfect evening to lock the doors and have a night at home with some friends. But what happens if one of the guests you've invited, is in fact the brutal killer that the city is fearing? House Guest is a tense thriller that locks you inside the doors of the Murphy home, where new relationships are formed, a Father and Son bond is tested, and a Brother and Sister struggle to stay alive.