Plot
Seven-year-old Wen is vacationing with her parents, Eric and Andrew, in a remote cabin in rural Pennsylvania. She is approached by a stranger named Leonard who explains that he needs Wen and her parents' help to save the world. Leonard and three other individuals break into the cabin with makeshift weapons and tie Eric and Andrew up. Struggling to fight them off, Eric sustains a concussion.
Leonard and his companions, Sabrina, Adriane, and Redmond, claim that they have no intention of harming the family. However, in the past week they have been driven by visions to find the family. They foresee an impending apocalypse in which oceans will rise, a pandemic will spread, and the sky will fall. The only way to prevent this is for the family to sacrifice one of their own. If they fail to do so, they will be the last living humans. When the family refuses, the intruders sacrifice Redmond by fatally striking him with their weapons. Andrew sees a figure of light as Redmond dies. Television news reports show devastating megatsunamis. Andrew believes Redmond is really Rory O'Bannon, a man who had assaulted Andrew in a bar years prior, and thinks Rory tracked him down for revenge. Leonard, Sabrina, and Adriane grapple with guilt but reveal that Redmond's death has unleashed the first judgment of humanity.
The next day, TV news reports a deadly variant of a flu virus tearing across the globe and the intruders sacrifice Adriane. Andrew uses a knife provided by Wen to escape his ropes, retrieves his handgun from the car, and shoots at Sabrina until she flees. As Leonard is being held at gunpoint, Sabrina charges in and is shot by Andrew. Leonard decapitates her. Andrew finds Redmond's wallet and shows Leonard that he was Rory. Andrew then confronts Leonard in the bathroom, but Leonard overpowers him and takes his gun. A TV broadcast reveals that hundreds of spontaneous plane crashes have occurred around the world.
Leonard informs the family that their time is nearly over, and after his own death they will only have a few minutes to make a decision. He then slashes his own throat. Upon his death, lightning causes fires and more planes crash out of the sky. Eric is convinced the intruders were correct and likens them to the Four Horsemen of the Apocalypse. Not wanting Wen to grow up in a destroyed world, he offers himself up as the sacrifice. He proceeds to envision an older Andrew and an adult Wen, both thriving in the future, and concludes that their family must have been chosen for the sacrifice for a reason. Andrew reluctantly shoots and kills Eric.
Andrew and Wen locate the intruders' truck in the woods near their cabin, where they find materials fully corroborating their stories. They drive off, making a stop at a crowded diner where they watch news reports confirming that the disasters have abruptly ended.
