Sixteen years ago Audrey Barreyre and her boyfriend break into a house on the Basque Corniche.

2003: Audrey is consumed by guilt - Franck, the father of her best friend Elaura was seriously burned during the fire. To avoid sinking, she manages to convince Joseph and his team to act as bait, in order to stop Itsas. Joseph reassures the terrified young woman. 2019: Audrey manages to get Ana, Maialen's best friend, to talk and discovers that the young woman was meeting married men via dating apps.

2003: Audrey tries to convince herself that Cortez is indeed Itsas' killer and to forget everything. 2019: The prosecutor seeks to remove Pauline from the investigation.

2003: Audrey comes to Elaura to apologize for her crisis during the bachelor party. But someone is lurking around the house where Elaura lives. 2019: In police custody, Patxi finally admits he was Maialen's boyfriend but claims to be innocent of her murder.

2003: Audrey is committed to a psychiatric unit. She tries to call Joseph to tell him the whole truth about the night of her assault. 2019: Ana confronts the man she met through the app.

Maialen's final moments are revealed.