… alter egos …

In the ballet Swan Lake, the White Swan princess, Odette, good and truly loving, is opposed by Odile, the Black Swan, wild and destructive, both ideally played by the same dancer.  What a role for a ballerina!  And now, in this film, the Artistic Director of the New York City Ballet is looking to cast a new dancer for his new version of Swan Lake.  Which soloist in the company will rise to star in this most coveted role?  Nina (Portman) is in the running:  the charismatic European impresario (Cassel) finds her dancing technically brilliant, great for the role of the White Swan, but lets her know she must loosen herself emotionally and sexually to fulfill the White Swan’s fascinating alter ego, the Black Swan.