"Lo imperdonable" is a Mexican telenovela that tells the story of two sisters, Verónica and Virginia, who are separated as children after their parents are murdered. Verónica grows up to become a successful lawyer, while Virginia is raised by a wealthy family. When they are reunited years later, Verónica seeks revenge on those responsible for her parents' deaths, while Virginia tries to protect her new family from the truth. As the sisters navigate their complicated past and present, they must confront their own imperdonable actions and decisions.