Caleb Smith (Domhnall Gleeson), a programmer at an Internet company, wins a contest that sends him to the private estate of Nathan Bateman (Oscar Isaac), his firm's brilliant CEO. When he arrives, Caleb learns that he has been chosen to be the human component in a Turing test to determine the capabilities and consciousness of Ava (Alicia Vikander), a beautiful robot designed by Bateman. However, it soon becomes evident that Ava is far more self-aware and deceptive than either man imagined.