Caleb Smith,  a programmer at the world';s largest internet company, wins a competition to spend a week at a private mountain retreat belonging to Nathan, the reclusive CEO of the company. Upon his arrival, Caleb learns that Nathan has chosen him to be the human component in a Turing Test-charging him with evaluating the capabilities, and ultimately the consciousness, of Nathan';s latest experiment in artificial intelligence, housed in the body of a beautiful robot girl.