"Surely you would like to be immortalised in art, fixed forever in perfection?" Sadler's Wells, 1933. I would kill to dance like her. Disciplined and dedicated, Olivia is the perfect ballerina. But no matter how hard she works, she can never match identical twin Clara's charm. I would kill to be with her. As rehearsals intensify for the ballet Coppélia, the girls feel increasingly like they are being watched. And, as infatuation turns to obsession, everything begins to unravel.