The series 'Traición' tells the story of four brothers and parents who are members of one of the most important law firms in the country. This new RTVE bet will start when the father, Julio, gathers the other members of the family to announce that he has a terminal illness. In addition to this, the father will want to make a series of changes that can seriously affect the other members of the family. On the other hand, it will unveil a secret that has been hidden for years and that will change everything.