 Eugenia Montiel (Maricarmen Regueiro) is a marginal young. Although she committed a crime being minor, she sits five years in the prison waiting her judgment. She knows that the responsable for her long imprisonment, was the lawyer Diego Mendoza (Carlos Mata). Eugenia hates him for this injustice and swears to take revenge on him. Silvana (Carolina López), a violent prey, hits Eugenia in the head with a fire extinguisher. She becomes blind temporarily. A strange woman called Endrina (Amalia Pérez Díaz) visits Diego and asks him to repair his injustice. Taking advantage of her blindness, Diego pretends to be a nurse and makes friendship with her. He falls in love with Eugenia although he doesn t know that her face is covered with bandage. But Diego is married to Pilar Luján (Cristina Reyes) with whom he has a daughter, María de los Ángeles. Before knowing the face of Eugenia, he marches leaving her the truth in a letter. Eugenia gets free and goes to live with Endrina and her sister Cándida (María Teresa Acosta) who adopt her. Cándida knows the secret about Eugenia s origin, but she dies without telling it to her. Eugenia only has a track: the name of "Constitución Méndez" (Caridad Canelón). With this only detail, Eugenia goes to Caracas in order to look for the cruel and powerful Constitución who is her real mother, something that both of them ignore.