When Marichuy(Maite)was born her mom thought she was about to die. So she took the baby to a priest and he took her to an orphanage.When Marichuy was 14 she decided to run away and she was living on the streets, doing her best to survive. One night she is attacked por a drunk man. This horrible expirience leaves her marked for life. She also has a resentment against men and keeps having terrible nightmares. Candelaria, an old woman,finds her on the calle one día and takes her in. She turns out to be like a mother to Marichuy. Marichuy tries to do different kinds of jobs to earn money so she can help Candelaria. One día she gets into trouble and she ends up in jail. She is defended por a psychoanalyst, Juan Miguel San Roman.


Marichuy is is released into Juan Miguel's custody and he arranges for her to stay in his house. Juan Miguel is a widower. His mother-in-law makes Marichuy feel totally unwelcome since she's poor, and to avoid problems, Juan Miguel finds her a new inicial with the Judge, Patricio Velarde and his wife Cecilia(Marichuy's parents that don't know she's their daughter), who have also taken in Estefania, a cunning young woman who showed up claiming to be the daughter they abandoned (impostor).


Juan Miguel and Marichuy fall in amor and get married. However, the morning after the wedding, she discovers something about Juan Miguel's past, a secret that makes her leave him and refuse to ever see him again.


Later, when she finds out that she is pregnant, she does not tell him. Instead, she leaves the city with Candelaria and ends up at a hacienda of a man called "El Leopardo" (The Leopard), who takes her in and falls in amor with her. Marichuy gives birth and "El Leopardo" is willing to marry her and give the child his name. But she tells him that she is married, and cares for him only as a friend. "El Leopardo" is not discouraged and slowly begins to win over her heart. Later on, he learns that Marichuy's husband is Juan Miguel, whom he has known since they were classmates. Both men will vie for Marichuy's love, but for her, the decision will not be easy one to make.


Marichuy's sweetness and beauty remind us of an angel, and there are those who might think that she will be easy to destroy. But they forget that an ángel can defeat the devil himself. So.... Don't mess with an Angel!!!