Tellería is a fictional 700 years old town that politically belongs to the Automous Community of Castilla-León despite to be located in the Basque Country (north to Spain), where its inhabitants want unsuccessfully to change of Community from much time ago. In the same day that Antolín, town's mayor, makes a new attempt just to learn that it was rejected again, his son Gorka and his job partner and love interest Yolanda back to the town to investigate town's church past, managed by town's priest Don Anselmo. When by chance Yolanda falls to the under ground due to the unfinished works made by well-known historian and archaeologist Peio, she finds a medieval sepulcher, discovering that it's the tomb of Walter Tell, son of legendary Swiss hero William Tell. Finding an ancient documents that it prove the creation of Tellería (Tellstadt in English) as a gift given to Tell after help to a King in a battle, it creates an incredible possibility: ask Switzerland to accept Tellería as its own. ...