[Machine Translation] This visitor (guest) has more (behind the scenes) than you can imagine. The latest film from the "Surprise" duo of director Adam Wingard and screenwriter Simon Barrett has received rave reviews for its unpredictable storyline. This film is not only an "unknown thriller," which is exactly what it is, but it is also a film that has established itself as a genre. --The Peterson family lost their eldest son, Caleb, in the Iraq War. One day near Halloween, a chime suddenly rings. The man, who identifies himself as David, tells the family that he is Caleb's comrade-in-arms and has come to give them his last words. It is an unexpected visit, but the Petersons gladly invite David into their home as if he were their son. He comforts his broken mother, helps his father with his work, and teaches his younger brother Luke, who is being bullied by his classmates, how to defend himself. Humble, disciplined, polite, and good-looking, David quickly becomes an important "guest" in the family. However, David's sometimes radical solutions to problems are questioned by his daughter, Anna. Furthermore, since David's arrival, there have been a number of unexplained incidents in the surrounding area. Ana begins to investigate David's past and finds an "organization," but it is already too late, and a mysterious special forces unit is deployed. A fierce gun battle ensues, and the city quickly becomes a battlefield. Who is he and what is his real purpose?