Dr. Miranda Grey is a brilliant criminal psychiatrist. However, after a auto accident, she wakes up only to find that she has been convicted for the murder of her husband Doug. With only fragmented memories of the alleged crime, she begins to dig deeper into her husband's past. Meanwhile she is being haunted by the ghost of a girl called Rachel who is seemingly trying to convey a message to her with the phrase 'not alone.' As Miranda learns more about her husband with clues from Rachel, she realizes that Doug is not who he seems at all.