Carlos and Lucía spot one of the Iranian drug dealers and try to arrest him, but El Ruso sees them and stops them by crashing their car, both cops start suspecting about Ferrer's involvement with the mob and decide to investigate him which puts in risk Ferrer's cover just as he has gained the confidence of the Iranians who offer to introduce him to their boss. Carlos has doubts about continuing his relationship with Patricia. Lucía receives some Saint Valentine's presents from her boyfriend, but she also receives a package form a mysterious admirer. Susana is robbed in the street and she is aided by a Dominican immigrant who is injured by the fleeing robber. Marina tries to add a mature woman who has been conned by a man pretending to love her, but convinced of her feelings the woman refuses to see she has been used. Rafa and Mateo are assigned to watch the cemetery, were several corpses have been stolen. While they are on the case Rafa continues dating Mateo's daughter, while he fears confessing this to his partner. Jaime and Gonzalo quarrel due to their mutual interest in Marina.
—Pencho15