Programmer Caleb Smith, who works for the dominant search engine company Blue Book, wins an office contest for a one-week visit to the luxurious, isolated, home of the CEO, Nathan Bateman. Nathan lives in a beautiful, modern home next to a waterfall and climbing hills and is alone apart from a servant named Kyoko, who according to Nathan does not speak English. After an awkward introduction, Nathan reveals to Caleb that he has built a female humanoid robot named Ava with artificial intelligence.