A family is grieving because their soldier son died overseas in one of America's terrorist wars. Amidst their pain, a young soldier shows up, claiming to be their son's best friend, who was with him when he died. He gives the grieving mother, father, sister, and brother kind words of love from their deceased family member. Slowly, this new young, affable soldier worms his way into their life...The family offers him their son's room to shack up in for a while, and he begins to help them all heal. For dad, he quietly kills a backstabbing work colleague so he can get a promotion to regional manager. For mom, he says all the right things that she needs to hear about her son. For the baby brother, he teaches him to fight and stand up for bullies, getting him out of much trouble at school. And for the hawt sis, played by Maika Monroe, he assists her with boyfriend trouble, friends, and more. The Soldier Guest, calling himself "David", even bangs Maika's best friend, Tabatha Shaun, in a rather hot rendezvous where she struts the goods just fine and dandy. As good as "David" makes things for the family, when all the dead bodies start piling up around them, they begin to suspect that "David" isn't exactly who he says he is. Things go from back to worse when the Army shows up to "apprehend" David and he turns out to be an escapee from a "special psyche project" or something worse. Did he even know their boy? Did their son end up a victim of this same project? THE GUEST is pretty decent and keeps your attention, kind of a variation on THE STEPFATHER type of slasher thriller movie, with a family put back together by someone who's too good to be true and ends up turning on them in the worst of ways. Sends the message that "if it's too good to be true....well, it's probably too good to be true." Plenty of action, suspense, gunplay, and a rather cliche slasher-esque end showdown between brother and sister and The Psycho Guest- pretty neat setting in a haunted house. Ending leaves is waaay far open for a sequel. This one is from Adam Wingard and Simon Barrett, the guys who brought you YOU'RE NEXT, another decent but plot-hole filled extravaganza. Worth a look and has a pulsing musical score in the vein of JOHN WICK and '80's Carpenter flicks, which seems to be the rage of the moment.