 Perfect Dark is set in the year <unk> against the backdrop of an interstellar war between two races : the <unk> , who resemble the stereotypical grey aliens , and the Skedar , reptile @-@ like extraterrestrials who can disguise themselves as humans , bearing similarities to Nordic aliens . On Earth the <unk> dataDyne has developed in secret Dr. Caroll , the world 's first sentient AI computer . Feeling that dataDyne has betrayed ethical and moral standards , Dr. Caroll contacts the Carrington Institute , an espionage agency founded by Daniel Carrington , with the hope of revealing dataDyne 's sinister dealings . He is recovered by Joanna Dark , the Institute 's top agent , but is later recaptured by dataDyne at Carrington 's private villa . Joanna is then sent to Chicago to once again recover Dr. Caroll and uncover dataDyne 's plan . She learns that dataDyne and their conspirators plan to kidnap the President of the United States in order to get access to a deep sea vessel which will allow the conspirators to steal an alien <unk> buried on the ocean floor . 
