Paz Roble, a kind, hard-working and honest woman from whom her husband, Fermín, takes her newborn daughter. Fermín has a large debt with some lenders and to pay it he decides to sell his daughter to Mauro Nicoliti. This plagiarism is orchestrated by Geneva, Mauro's adoptive sister. She lost her first-born daughter in childbirth and does everything to replace her dead daughter and keep her husband's fortune. On the other hand, Esteban Villa de Cortés loses his wife and becomes a widower with his three children. Elvira Moncada, Esteban's mother-in-law, holds him responsible for the death of her daughter. After a series of unexpected events, Esteban and Paz meet in the neighborhood where she lives with her family. The chemistry and great understanding that exists between them makes it inevitable that they will fall in love.
Paz is worried about talking to Sam and communicates with her, Mauro listens to them. Esteban shows Gala a scale with which they will monitor her weight and assures her that he, the doctor and she are the only ones who will have that information. Ginebra lets Eder know that 'Monito' is a street child and warns him to be careful of him, since she could cause him harm. Eder defends Paz and assures Ginebra that it was her idea for Sam to have a cell phone and asks him not to scold her.