Lucia secures a job with a British company in Spain. She may not have been completely honest in her interview, but her new position may be much more than she bargained for.

After an incident at the port, Edward and Juan ask for Lucia’s help. Lucia’s fiance Francisco demands answers from her. London sends a new agent to Huelva, dredging up painful memories for Peter.

An Italian spy arrives in Huelva with classified information that both sides want. At the King’s party, Lucia uncovers more secrets--this time about her family.

As the Nazi flag flies over Paris and Italy enters the war for Germany, Lucia and Agatha infiltrate Schneider's birthday party, using microphones to gather crucial intel for Britain.

Lucia and Peter pose as a married couple in Seville to catch a saboteur, but tensions between them threaten the mission. Meanwhile, Francisco agrees to Hanna’s demands.

After Seville, Peter is torn by his warring feelings for Lucia. At a state visit for the ambassador, Lucia is asked to translate. Elsewhere, family tensions are rising.

Shocked by the sudden death of someone close to her, Lucia wants to abandon her life as a spy but is met by pressure to persist from both sides. Meanwhile, Cinta’s secret is out.