de la wiki:
(la primera parte es igual, hasta que...)
The next day, as the intruders prepare to sacrifice Adriane, Andrew escapes the cabin and retrieves his gun from the car. He kills Adriane, but during a struggle with Leonard over the gun, Wen is accidentally shot and killed. Devastated, Leonard allows himself to be tied up by Eric and Andrew, but he says that Wen's death has not stopped the apocalypse because she was not a willing sacrifice, and Eric or Andrew still must die. Eric has begun to wonder if the story is true and has visions of flies that lead him to turn on the TV, which shows an outbreak of bird flu. Andrew insists the disasters are coincidental and the visitors were anticipating pre-scheduled news broadcasting. Sabrina describes how she and the other visitors were led by their visions and compulsions to find each other online, execute details of their plan such as their weapons, and to continue forward when they wanted to resist. She decides that, after Wen's death, she wants to abandon her task. Sabrina kills Leonard and offers to lead Eric and Andrew to Redmond's car. The TV shows spontaneous plane crashes taking place around the world.
The couple follow Sabrina into the forest, taking Wen's body; Sabrina recovers the car keys and a gun that Redmond hid. She tells Eric there is still time to prevent the apocalypse, then commits suicide before she can be further compelled. Eric considers taking his own life, but Andrew argues that even if the apocalypse is real, he refuses to obey a god that does not accept Wen's death as enough. They decide that neither wants to leave the other alone by dying. Grief-stricken, Eric and Andrew head for Redmond's car with Wen's body, deciding to stay together through whatever comes.