Barbara, a journalist in the beginning of the 20th century, searches in the border between Portugal and Galicia a bandit called El Argentino. In her travel she meets two men that say that they belong to his gang.

该剧主要讲述了一位高中哲学老师Merlí和他的学生们的故事，每集都以一个哲学故事贯穿始终，每一个故事都耐人寻味。这部剧里没有谁是绝对的主角，每个人都有自己的故事，各自精彩。

Pedro goes out searching for a girl, but the night doesn't seem to be good. While he is talking with a friend, he sees Sara breaking up with a boy. He goes after her, and they end up sleeping in his house. Time goes by and they continue together. But Sara has too many men around and Pablo can't stand that. Their relation is difficult, they love each other but, at the same time, they can not be together

本剧第三季率先于2017年5月5日在西班牙巴塞罗那Liceu大剧场试映，官方宣布将于5月15日首播。
Julián的扮演者因个人原因将缺席第三季，Pacino将代替Julián成为三人小分队的一员，Amelia、Alonso和Pacino将面临新的任务。
而在前两季中出现的Lope de Vega、Cervantes等重要历史人物，也将重新登场。