It's been a while since Inspector Amaia Salazar (Marta Etura) confronted her mother. But although both the Guardia Civil and Judge Markina (Leonardo Sbaraglia) consider the case closed, Amaia feels that she is not free from danger.
The sudden death of a girl in Elizondo is suspicious and the forensic analysis of Dr. San Martín (Paco Tous) leads Amaia to investigate other deaths of similar origin that will lead the inspector to the final resolution of the events that have ravaged the valley of Baztan.
Film shot in Barcelona, Terrassa, Sentmenat, Bellaterra, Hostalric, Sant Just Desvern, Mataró, Cerdanyola, La Roca del Vallès and L'Hospitalet de Llobregat.