1954: Comandante Guzmán has been posted deep into the Basque country to confront a man known only as "El Lobo." High in the mountains, Guzman will have to fight for his life, not only against El Lobo, but also against someone who has been searching for him for a very long time. 2010, Madrid: Forensic Investigator Ana María Galindez has spent seven months in hospital recovering from the blast that nearly killed her. Her obsession with Guzman's fate has disturbed long dormant forces. Now she shall reap the consequences: she will be purposely humiliated, abandoned by colleagues and friends, accused of murder—and worse.
