Ferrer, Ruso and Nerea continue the investigation about the girl strangled with her own bra, and all the leads point to her boyfriend. But a new victim murdered with the same modus operandi shows they are on the wrong track. Susana helps a woman to give birth to a girl, only to find out she intended to sell the boy to a childless couple, but when she has second thoughts the adoptive parents kidnap the baby and Carlos and Lola are called into the case. A criminal that robs mature closeted gay men is on the loose, and Mateo and Rafa are forced to impersonate a gay couple in order to stop him. Jaime and Vera deal with an old age couple refusing to be separated by the daughter of one of them, the case puts some strain in their relationship. Patricia, Carlo's ex-wife, is forced to make a sex tape by some Colombian drug traffickers that intend to blackmail a judge.