When a tragic past comes to haunt the future

Jess, a struggling dancer, is trying out for a part in a musical about Medusa. As she practices, the director notices how much she resembles his former lover, a ballerina who died in a bizarre on-stage accident while performing the exact same dance that Jess is doing. As more unexplainable coincidences surround the production, someone or something must be behind them all. But who? Or what?