Rosa is abandoned as a baby at a boarding school along with a payment of 18 white diamonds. Her mother is Rosaura Sotomayor, a distinguished socialite who needs to hide the fruit of her affair. Rosa grows up and befriends Eva Sotomayor, and both girls vow to live as sisters. Their lives change after they meet José Ignacio Altamirano, an attractive, intelligent and conquering man who takes advantage of Eva’s innocence. The rich heiress dies in a mysterious accident, and Rosa decides to take her identity to avenge her dear friend.