David Martos works undercover to exhume an uncatalogued Civil War mass grave where he believes his family may be buried, based on the seemingly delusional stories his grandfather told him.
The corporal of the Mossos Andrea Carmona and a local police officer investigate the murder of a young man next to a mass grave that he had exhumed.
Joana, mother of David and Guillem, is overwhelmed by her father's shocking secret, the death of one son and the accusation of another; Andrea escapes a turbulent past as new evidence is uncovered about new suspects.
Andrea finds a photo of Jaume as a young man with a girl wearing an earring similar to the one found in the pit, an object that does not fit the post-war era. It turns out to be a young Belgian, Zoé Goossens, officially missing in India.
Jaume learns that he is charged with David's murder. Cornered, he wants to incriminate Angel; Joana finds some papers that confirm that Àngel's farm belonged to his family; Jaume appears to take revenge for Zoé's death.
