Andrea, in search of her biological family, feels stalked by an invisible threat. Other women before them have suffered the same fate. Twenty years earlier, on the other side of the world, Camille, fascinated by Marie, tries to warn her of a threat hanging over her.
Carmen and Elena Iturrioz are sisters and partners in a laboratory inherited from their parents. Both carry out the cases that reach the laboratory, together with a team of collaborators. Each episode will stage a new story that arrives at the laboratory at the hands of characters seeking to find out their identity, recognize a son or a brother, gain access to an inheritance or identify a genetic disease, among others. they will reveal who they are; they will get closer to their own personal and family identity.
