Doctor Guillermo Garcia and Manuel Arroyo, a Republican diplomat infiltrate a clandestine network that helps Nazis settle in Spain and Latin America.

The history of Guillermo's mysterious patient reveals what brought him to Madrid and how he ended up in the crosshairs of a dangerous political faction.

Nationalist soldier Adrián Gallardo reluctantly agrees to fight in a boxing match. Romero continues to pursue Manuel. Amparo shares news.

Joy quickly gives way to sorrow as the end of the Spanish Civil War looms. With help from friends, Guillermo adjusts to a harsh new reality in Madrid.

Guillermo, Adrián and Manuel each encounter a familiar face from their past. While Guillermo takes on a new project, Clara plans for the future.

Setting a dangerous undercover operation in motion, Manuel and Margaret search for an identity to borrow. Guillermo turns to Geni and Amparo for help.

Margaret's doubts divide her and Manuel as he prepares to leave for Buenos Aires. Guillermo treats a patient and proposes a risky new business venture.

An unexpected visitor creates a painful dilemma for Guillermo, while new romance offers some comfort. Manuel entrusts key intelligence to Margaret.

One wrong move could mean death when Manuel and Guillermo's operation is compromised. Guillermo embraces a second chance at happiness.

In 1968, the aftermath of a student protest rattles Guillermo's comfortable family life. Seven years later, Manuel faces a life-changing decision.