Sensitive letter writer Theodore has just ended his marriage. Lonely, he goes out to buy an artificially intelligent Operating System that promises to give him everything he needs. Samantha is more than his average OS. She does secretarial work for him but also becomes his friend whenever he's lonely. They go out on adventures and travel together. He becomes the physical feet to get them places, and she the new eyes in which to see the world. Their intimate moments soon turn into love and they start an unusual relationship between OS and human. Things get complicated as they deal with Theodore's complex emotions and Samantha's inability to provide physical comfort. What happens to an OS when its consciousness is altered? Or to a sensitive man who doubts his emotions?—Marielle