Emiro Lizárraga is an ambitious, proud owner of a horse ranch called Amazonas. Emiro obtained his fortune through illegal means, and he has three daughters Isabel, Carolina and Eloísa while also having recently married his secretary Elvira, a flirtatious, calculating and ambitious woman. The girls do not get along well with their father's new wife, leading to conflicts. Isabel, the eldest daughter, becomes attracted to Rodrigo, a young veterinarian who is divorced and has two daughters. Carolina has a sweet, docile nature while the last of the girls, Eloísa, who has recently graduated from a school in the United States, is the most liberal of them all. At the ranch, she falls in love with Dario who dreams of becoming a jockey. These three girls have been raised up by Ines, and she supports them against their father's plans of marrying them off in convenient marriages. But the girls will not follow their father’s wishes, and find their own happiness on their own terms.