When a psychiatric doctor researches a young girls' diary to find out why she murdered her entire family, he begins to fall into the same state of insomnia and confusion that led her to lose her mind.

Sarah, a struggling young woman, agrees to volunteer as a test subject and be implanted with the LEXX nanochip for a pharmaceutical company experiment. She hopes that the money received for her participation will solve her financial troubles. When the implant turns sinister and orders her to commit crimes, Sarah is plunged into a murderous spiral with only one choice: to live or die.