1128, São Mamede. Gonçalo Mendes da Maia, the famous Lidador, one of the most important nobles of D. Afonso Henriques, fights bravely against Castilian enemies, without realizing that it is filmed at a distance by two men of the future. Only at the end of the battle, when it seems that only the Lidador has survived, when the silence falls on the field, the sound of the super8 film camera is heard. The medieval nobleman founds strange men watching him. As he prepares to interrogate them, a Castilian comes out of nowhere and kills him. One of the great Portuguese heroes died prematurely. Lisbon. 2016. It's been months since the last mission. Tiago returns to work, but he is still very shaken after what he discovered there. Afonso, Amélia, and the other members of the Ministério do Tempo try to help him get back to work, but everything seems to be fruitless. Irene also returns to active. Unlike Tiago, she's not well received. She's seen by members of the Ministério as a traitor. Only Salvador insists that she returns to work. Salvador summons Afonso and Amélia. He has a new mission for them. The Ministério discovered the tomb of the Lidador, during archaeological excavations ... But DNA analysis proves that the bones deposited there are not of the medieval knight. The patrol must leave immediately for 1139, on the eve of the Battle of Ourique, and discover what has happened. Amélia and Afonso want to know why Tiago wasn't summoned to the mission. Salvador just says he has a substitute for Tiago: Afonso de Albuquerque. Amélia, Afonso and Albuquerque arrive at 1139 and are quickly captured by the man who is supposed to be the Lidador. They will have to convince him that they are patriots and fight for Portugal in order to regain their freedom to find the evidence necessary to confirm that he is an impostor and find out what is the motivation behind this situation (which will go far beyond what the patrol can imagine). In 2016, Tiago makes a decision that could change the patrol forever.