Before I Forget

After being diagnosed with Alzheimer's, Pascual León robs a weapon warehouse and kills a judge. Jimena Guerra, the cop investigating the case, finds a mysterious message for her on the corpse.

Jimena goes after the possible murderer of the judge. She confronts Pira and an attraction arises. Pascual fails to kill the truck driver Martinez but kills Adrian, however, he suffers a heart attack right after.

Pascual recovers from his heart attack and kills Erick Santiago. Jimena Guerra determines that this is a serial killer and that Asunción de la Sal must be a key piece in the investigation.

Pascual loads Erick Santiago in the trunk of his car. He goes after his next victim: the old man, Julian Baños. After a chasing him around San Pedro, he annihilates him. The old quarrels between Jimena and Rosa come to the surface.

Jimena Guerra discovers Erick Santiago's corpse in Francisco Pira's house. It is the birthday present that "the Cat" left her. They both decide that they will notify the authorities, even though it makes it obvious that they spent the night together.

Jimena Guerra and Martín Tolsá discover that the official version of the fire at the Salvadorans' house is treated an accident and does not mention any lynching.

Pascual decides it is time to kill Olmo and manages to enter his house disguised as Cat. However, he bumps into Sara. Pascual flees. Olmo thinks that Sara saved his life and she feels a strange, trusting connection with the Cat.

Pascual's Alzheimers worsens so he decides to travel to Asunción and accelerate his murders. Jimena's investigation progresses; Ana confesses that Rebeca had a diary.

Pascual and Nuri go on a weekend trip to Asunción de la Sal. In reality, Pascual wants to use this trip to continue with his murders. It is Pablo Valdominos' turn, the former principal of the elementary school.

Jimena discovers what happened to Rebeca. Mateo murders Pira. Garduño appears dead. Pascual is admitted to a psychiatric hospital but escapes with the help of Jonás, kidnaps Olmo and finally takes rev