The investigation takes a dramatic turn as Raquel leaves the cobblestone streets of Spain for the grand avenues of Buenos Aires. Having learned the truth from Teresa Suárez in Madrid, Raquel must now locate Rosario’s son, Ángel. Prepare for a shift in accent, new cultural discoveries, and the deepening mystery of Don Fernando’s past. 

Episodes 12–18: The Buenos Aires Investigation –Upon arriving in Argentina, Raquel’s mission transforms from a historical inquiry into a deeply personal family detective story. This set of episodes tracks her partnership with Arturo Iglesias as they navigate the urban landscape of Buenos Aires to uncover the truth about Rosario’s second life after leaving Spain. The narrative balances the technical aspects of the investigation—searching archives and following leads—with the emotional weight of a family reunited across oceans and decades. By the end of this set, the focus shifts from finding Rosario to tracing the “lost” son, Ángel, setting the stage for the next leg of the journey.

Episodes 19–21: The Family Legacy & Departure: This final set of the Argentine Pillar shifts the focus from “The Search” to “The Connection.” After successfully locating Rosario’s final resting place and meeting her living heirs, Raquel spends her final days in Buenos Aires navigating the emotional fallout of her discoveries. These episodes bridge the gap between the somber history of the Castillo family and the hopeful future of Raquel’s mission, culminating in her departure from Argentina as she boards a flight to San Juan, Puerto Rico, to track down Don Fernando’s son, Ángel.