Undercover agent Javier Morey arrives at El Príncipe’s police station. Right away, he must look into the disappearance of a drug lord’s brother.

A corpse is found and identified as Abdu. The police's inaction around the case makes Morey suspicious. Meanwhile, Faruq has plans for revenge.

Morey thinks Sara is key in the investigation into Abdu's disappearance, but she is warned to stay silent. Fátima has doubts about the wedding.

The explosion yields clues about what could be a terrorist cell. Faruq searches for Abdu on his own. Fátima is pressured to end her affair with Morey.

The civic center is sacked, spoiling Morey’s and Fran’s plans. Fátima becomes a suspect, and the CNI is forced to make bold moves.

Morey is pulled from the case, which further blurs the line between his work and his feelings for Fátima. Fran finds out what really happened to his son.

The next terrorist attack is being devised. To frame Omar, Fátima is coerced into learning vital techniques of the CNI from Morey— in a single night.