When Marichuy was born, her mother—believing she was on the verge of death—handed her over to a priest, who took her to an orphanage. At the age of fourteen, Marichuy ran away from the institution and began wandering from place to place, scraping together a living however she could. Years later, she was attacked by a drunkard; the incident left her harboring resentment toward men and plagued by harrowing nightmares.

Corazones al límite is a Mexican telenovela about a teenage girl named Diana who was emotionally neglected from her parents, and felt unwanted. After being expelled from her boarding school in Switzerland, Diana goes back to live with her parents.

Having to serve a sentence for a murder she did not commit but took the blame for, a woman gives her baby to her sister to be raised without knowing the truth. 20 years later she is freed and try to be once again part of her life. But things get complicated when the daugther, Rosalinda, and Fernando, the son of the man that was killed, become close.

Rodrigo Junquera finds out he is close to death, he decides to ask the nanny of his young child, Virginia Martínez, a beautiful and honest woman, to marry him with the intention of preparing the road so she can look after his children when he's gone. Virginia has to deal with the contempt of Rodrigo's children who acuse her of being an ambitious woman who married their father for his money. Virginia is in love with Rodrigo's eldest son, Carlos Alberto, who has come to mistreat her after finding out she married his dad.

A gentle artist contends with his cheating girlfriend, and an innocent girl longs to break free from an abusive relationship. When fate brings these two lovelorn people together, true love finally blossoms.