Princess Tutu this is not. This is much more Paranoia Agent or Perfect Blue. A dark, melodramatic take on the fractured psyche of an outwardly perfect person and the pressure that makes them crack. Darren Aronofsky, the director, has crafted a psychological-horror story about ballet that is worth watching.
Nina Sayers (Natalie Portman) is an extremely dedicated ballerina with the New York City Ballet Company. She is desperate for the lead role of Swan Queen in Swan Lake but despite giving her the part, demanding Principal Thomas Leroy (Vincent Cassel) thinks she is too innocent to portray the Black Swan and must work harder. Pressure is mounting with a company of fellow dancers prone to jealousy, and an obsessed mother (Barbara Hershey). Things are made tougher when Lily (Mila Kunis) from San Francisco arrives and proves to be effortlessly sexual, vivacious and a good dancer, easily able to be the Black Swan. Nina finds her personality fracturing and a doppelganger emerging.