Pascual León, a retired 65-year-old man, starts an elaborate plan of revenge after being diagnosed with Alzheimer's. Meanwhile, Jimena Guerra, a policewoman, finds a mysterious message addressed to her at the crime scene.

Jimena begins the investigation on the Judge's murder. Tired of the attacks from the press, she decides to confront Francisco Pira, while Pascual carries out the next stage of his plan, not without some surprises.

After finding more messages in the new corpses, Jimena shares her theory with Tolsa and they travel together to Asunción. Pascual continues with his plan, while secrets about Olmo are revealed.

Pascual travels with Nuri to Asunción and continues with the murders, although the accumulated lies won't be easy to handle.

Jimena discovers the truth about Rebeca's suicide. Meanwhile, the number of deaths increases. Despite some obstacles, Pascual intensifies his plan of revenge and unfolds the final stage.