Peter, although in love with Lucía, does not trust her and will do anything to prove her loyalty. The Nazis' plan against the British ambassador, who is coming to visit Huelva and for which Lucía will be the translator, will bring everything to light.

The crash of an English plane in Huelva will give the team information that will be their last mission before leaving Spain. Lucía, pressured by Schneider, will have to put everyone's lives in danger.