Framed by her lover for corporate fraud, young Macarena Ferreiro finds herself locked up in a high security women's prison surrounded by tough, ruthless criminals.

Still in denial, prison proves to be a very rude awakening for Macarena and at the end of her first day, she finds herself struggling to cope. Yolanda, her cell mate, takes Macarena under her wing, but a midnight visit from Zulema, the prison's most dangerous inmate, is about to change Macarena's life forever.

In Spanish with English subtitles.