Night & Day

When performing an autopsy on the charred corpse of a car crash victim, respected forensic pathologist, Sara Grau, recognizes a familiar tattoo on the burnt body: it is identical to the tattoo of a man she had a one-night stand with.

As the Granny Killer follows Sara and Lluís to the hospital and is recognized by Sara as the man she had a one-night stand with, the police discover their first lead.

The police use a security camera photo to investigate the case of the serial killer terrorizing the city; Aitor Otxoa, a forensic psychiatrist, must determine the responsibility of a suicidal young man.

The same day Sara proceeds with the pregnancy test, her husband goes on a business trip to Tangiers with Clara; firefighter Marc Ramos saves a woman's life and starts to select his new victim.

The serial killer acts again with a fifth victim and Judge Cases comes under mounting pressure from the public to catch the killer and publish the unclear images of the security camera.

Sara's involvement in a case of a murder from overdose makes her reconsider in-vitro fertilization; Lluís Forés tries to remove Clara Salgado from the Tangiers project.

Sara examines a case that involves someone affected by Munchausen syndrome; Mercè finally agrees to Judge Cases' demands for a divorce.

Judge Cases collapses when he is questioned about Mercè's murder; Ramos is furious when he hears news about a copycat killer.

Lluís feels angry and rejected after he loses his job; Sara deals with a rape case; Judge Comas takes care of the Granny Killer case.

Sara investigates and learns more about the dark past of Marc Ramos and gives the police her prime suspect's name; Aitor heads off on a soul-searching journey into the heart of the Basque Country.

Clara moves to Aitor's place; Ramos is released from custody when his alibi checks out and a DNA test clears him of any involvement in Mercè's murder.

Once Ramos is free he paints himself as an innocent victim in front of the press, and makes Sara's life a living hell; Judge Cases attempts to contact Fajardo, but he is arrested again.

Sara comes into possession of an incriminating video of Ramos; Lluís Forés gives Sara 24 hours to remove all her personal items from the house.