A storm occurs on the night when Dolores is about to give birth, threatening to completely ruin their livelihood. Her husband Juancho is forced to leave her in the incapable hands of her sister, Violeta. Dolores gives birth to the triplets Rosario, Rosenda, Rosemarie. However, Arsenio, Dolores' former lover, is the attending physician, and he takes the youngest triplet, Rosita due to his bitterness and resentment. He convinces Dolores and Juancho that Rosita died at birth, and then raises Rose Marie abroad where she remains ignorant of her true origins and becomes very sophisticated. As the years pass, rivalry arises between the remaining twins. Rosario grows up to be charming and sweet but unhealthy, and her parents give her a lot of attention. Rosenda therefore grows very jealous of Rosario, as well as self-centered and scheming. Following a confrontation between the twins, Rosario drowns, convincing her parents that they have already lost her. Unbeknownst to them, however, she has been found at the bay shore by a kind-hearted couple who raise her as their own. From then on the three sisters live separately, unaware of each other's existence until they rediscover each other at the expense of their family's well-kept secret and long-forgotten sins.
