Dimas prepares the boy for his next fight. Meanwhile, Marina heals his hands after the fight, but the boy is thinking about what happened a few years ago, when he let go of his mother's hand. Buendía and Elena analyze the situation after the operation. Reme, the accountant, is detained and they must find out where she kept the money that has not been found after the inspection. Elena decides to question Judge Zamora and the former director of the orphanage, Villacampa, despite the fight she has with Mariajo, who sees it as risky. Elena tries to corner them, but she only succeeds in angering them. However, with Reme, they have better luck. Chesca will infiltrate one of the most complicated operations as a guest in a bullring box.

Dimas manages to annul Lucas's fragility, in shock, taking him to meet The Mother, who marks him with an iron seal that identifies the cursed heirs, baptizes him with the name of Cain and assures him that his only mother is she. For her part, Elena and Orduño try to extract information from Marina, but it is impossible. They pressure her, but the only thing she manages to stammer is that she has always lived locked up, and she recognizes that she participated with Dimas in Lucas's kidnapping. Mariajo negotiates with Rentero to support the operation, but he does not agree. At the BAC they organize the operation in order to put an end to the spearhead of the network and save Chesca.