An uninvited guest at a wedding brings intriguing news to Hache, who spots an opportunity. A robbery casts a shadow on Vinuesa's newfound happiness.

Hache is given just one week to get her lab running. The surprise arrival of a relative adds to her stress, but Ventura provides an escape from it.

Laforet pays a visit to see the lab and offers Hache a deal. Mateo tries to woo Mirta, who makes a demand. Camino confesses a secret to her husband.

Vinuesa eagerly investigates the incident at the club. Arístides tries to smooth things over with Pío. Hache runs into Celeste in an unexpected place.

The heroin is finally ready to ship, but Hache needs Arístides' help to fly it out of Barcelona. An argument between Camino and Piero gets out of hand.

A sudden loss brings Luciano to Barcelona to investigate. Camino's nerves threaten to betray her to the police. Silvia reaches her limit with Vinuesa.