Sira attends the end of the year party at the Casino of Madrid by accompanying a client, in which she will meet Gonzalo, her father, who will try to resume his relationship with her. However, a new mission demands her full attention. Hillgarth summons Sira to a clandestine meeting in which he tells her that since the cessation of Beigbeder as Minister, the German pressure on Spain has intensified. Hillgarth talks about a Portuguese businessman who is suspected of playing a double game with Englishmen and Germans, Manuel Da Silva. Before her imminent visit to Madrid to attend an exclusive dinner, Sira must get invited through one of her clients, Frau Sterling, to engage in conversation with her and try to get information. As part of the mission entrusted to her, Sira will have to travel to Portugal. But without realizing it, on the train will travel another person from her past as Sira that could endanger her cover.