Part of a series of documentaries that revisit the Spanish Civil War and Francoism. Muerte en El Valle (Death in the Valley) is an investigation that the director undertook in her own family, relating to the death of her grandfather. During the search she faced one of the assassins of her ancestor. Los héroes nunca mueren (Heroes never died) reflects on the controversy that arose around the famous photograph by Robert Capa of a soldier who was killed by an enemy bullet. The film also examines one of the fundamental tenants in journalism - the mechanisms of the construction of truth.