Please note this is a region B Blu-ray & will require a region B or region Free Blu-ray player in order to play Adam Wingard directs this US thriller in which an ex-soldier causes mayhem within a family David (Dan Stevens) knocks at the door of the Peterson family & informs mother Laura (Sheila Kelley) that he was a close friend of Caleb (Chris Harding) the son she lost in combat Welcomed into the family home David is initially granted a hostile reception by Caleb&s brother & sister Luke (Brendan Meyer) & Anna (Maika Monroe) However David&s handy ability to buy booze & deal out violent retribution to bullies quickly ingratiates him with the teenagers That is until an usual sequence of events raises suspicions that David may not be who he claims Will any light be shed on the guest&s mysterious past?