La sinfonía del miedo

Víctor Echevarría left the police force after witnessing the murder of his partner, Rebeca, at the hands of the "Salamanca Executioner"—a macabre and elusive serial killer. Since then, when sober, he has worked as a private investigator in Madrid, the city to which he moved in an attempt to forget the past. One day, however, he is hired to locate Carolina, a young woman whose boyfriend, Álex, and mother, Edurne, have lost all contact with her. As the investigation unfolds, Víctor discovers that Carolina has an unusual relationship with sex; he fears she has spiraled into a dangerous, frenzied lifestyle that led to her disappearance. With the assistance of Inspectors Álvaro de la Torre and Elsa Bermejo, the detective uncovers the sordid secrets of Carolina and her family—pushing them to the breaking point—while simultaneously picking up the trail of the Salamanca Executioner and the incident that changed his own life forever.