It is a pity that the first comment shown about this movie distorts one of the most interesting things about it: the "nice girl" in this story has not a "past" "childhood physic problem", she has schizophrenia, and like thousands of schizophrenic people, she has to live both with her condition and the stigma of being cataloged as "nuts" by everybody if she decides to tell about it. So as every schizophrenic do, she tells no one, she just takes her medication and leads a mostly normal life, a bit afraid of her voices to appear any day again and very afraid of being rejected by others because of such possibility.
From that point, the movie turns into a very interesting movie, if a bit expectable in the outcome, really good in every other aspect. Katheryn Winnick has everything it takes to be a star, she is remarkably beautiful, but she can make you forget about that, and she can make you forget that she is anyone but Nina, tortured by the noises in her head, unable to trust what she sees or believes is true anymore.
A movie worth to see, for many reasons
