A psychologist is forced to confront her past when a new series of murders echoes the crimes that put her serial killer father behind bars 25 years ago.
Sara shudders at the news that her father has been released from prison, 25 years after being arrested for burning three people alive.
Following another murder, the police ask Sara to describe her father's modus operandi. Interest in the case triggers a serious incident at Sebas's school.
While the police search Félix's house, he gives his statement to Arias for the first time. Sara meets with Jaime to try to patch things up, but ends up playing with fire.
With a journalist on her trail, Sara struggles to keep her identity a secret. Arias and Jota are searching for an admirer with violent tendencies.
The family adjusts to their new reality while Arias investigates the movements of a new suspect. Meanwhile, in the past, young Sara hits rock bottom.
Mario puts himself in danger to cooperate with the investigation. At the rowing club, Sebas makes threatening remarks. A session with Jaime turns turbulent.
Félix receives a package that foreshadows another tragedy and jeopardizes Arias's job. Quique invites Sebas to have some beers with his colleagues.
Sebas faces lifelong consequences, and Sara's world crumbles. Can an old letter reveal the killer's identity?
