该剧讲述了跨越不同时期,在隐形战线上的人民英雄是如何不惧怕任何危险,不计较个人牺牲,甚至不顾人民内部的误解和生死裁决,都不暴露个人真实身份,至死不渝,与敌人周旋到底的英雄故事。。Juan, a prison officer, silently observes the visit every Sunday of Berta, mother of one of the imates. The day he finally approaches her, he surprises himself by pretending to be another visiting father and inventing a daughter inside the jail: Josefina. The need to fill the vacuum of their lives prompts Juan and Berta to continue meeting outside the reality around them.。