Caleb, a 24-year-old coder at the world's largest Internet company, wins a competition to spend a week at a retreat belonging to the company's reclusive CEO, Nathan. But when Caleb arrives he finds that he will have to participate in a fascinating experiment with the world's first true artificial intelligence, housed in the body of a beautiful robot woman, Ava. Truths, emotions, and motives are blurred as the relationship between Caleb, Ava, and Nathan intensifies.