Civil Guard officer Rosa Vargas arrives in a small Galician town to investigate the disappearance of a teenage girl, and soon develops a chilling theory.

Using one of the costumes found in the old factory as a lead, Rosa tracks down the shop it came from, and later dons her own disguise to go undercover.

Memory cards found in Marta's belongings reveal a new suspect with a fetish, while forensic results from the factory scene point to an unusual hobbyist.

Rosa learns who dante78 is, and finds a clip from Marta's final blackmail video, which reveals a secret party circuit. A jealous male targets Rebeca.

Samanta tries to find out what Xabier is hiding. Rosa forces Iván to tell her everything about the parties, and helps Rebeca with her photo scandal.