In this 2011 horror-thriller directed by Adam Wingard, a family reunion turns into a night of terror when masked assailants invade a remote mansion. As the family members are picked off one by one, a surprising and resourceful guest emerges as their best hope for survival. The film stars Sharni Vinson, who delivers a standout performance as the unexpected heroine. Known for its clever twists and dark humor, the movie has gained a cult following over the years. For those interested, it can be viewed for free on 123Movies / Movies123.