该剧改编自西班牙作家哈维尔·卡斯蒂略的畅销小说。　　一年级住院医生克拉拉·梅洛因严重的心脏病发作不得不接受心脏移植手术。在康复期间，她产生了想要了解捐献者的强烈愿望，这使她来到一个偏远的小镇，试图了解那个将心脏捐给她的年轻人的生活。克拉拉因此深入这个充满秘密的小镇，这里隐藏着长达二十年的谜团，而就在她到达的当天，一名婴儿在公共公园失踪了。

　　In the second season of El Cid, after the death of King Fernando, his sons Sancho, Alfonso and García became the kings of Castilla, León and Galicia, respectively. Urraca, lady of Zamora, will handle the threads of power and we will discover her darker side. The disputes between them will transform the Iberian Peninsula into a field of bloody battles. Ruy is knighted, but in the process he will have to sacrifice what he loves most to become a true hero.