The film is about a ballet dancer who wins the lead in "Swan Lake" and is perfect for the role of the delicate White Swan - Princess Odette - but slowly loses her mind as she becomes more and more like Odile, the Black Swan.
What i like about this film is that there is a continuous feeling of tension and there are a lot of false plateau . The film also creates a lot suspense because it always has the audience trying to guess whats going to happen and then what the audience believe would happen, doesn't.
Its a psychological thriller because it has many scenes where the audience believe they know whats going on but soon after they have no clue whatsoever, (false plateau). It does the same to actress who is playing the role, making her believe that she is seeing two images of herself when really its all in her imagination.