The film highlights the physical and psychological toll of elite performance, depicting the "glass" fragility of the dancers' psyches.
The film follows Irene (María Pedraza), a dancer who is suddenly thrust into the spotlight as the lead in the National Ballet's production of Giselle after the previous star tragically dies. Crushed by the immense pressure and the hostility of her peers, Irene finds solace in Aurora ( Paula Losada ), a shy, isolated dancer dealing with her own controlling mother. Together, they create a secret, obsessive friendship that acts as a sanctuary from the real world, though it eventually begins to blur the lines between reality and their shared delusions.
It examines how extreme environments can forge deep, albeit sometimes toxic, bonds as a survival mechanism.