With Caronte fully focused on unmasking Paniagua, Marta is alone working on a case very close to home. Her ex-boyfriend Mario could end up in jail for assaulting a co-worker under the influence of drugs. At the same time, Guillermo organises a big party at Caronte’s house where a mysterious man takes Caronte’s gun.

Caronte is sent to prison, accused of murdering Toni after Paniagua had staged the whole thing to frame him. Marta gets down to work and, with Aurelio’s help, collects different pieces of evidence to convince the judge the commissioner had set it all up. Just when Caronte believed he’d lost all contact with Natalia, his ex reappears in Madrid to talk to him.