First part: Andrea is a beautiful young woman, with a lot of desire to live, but nevertheless she has a heart disease. She works as a fashion designer, and she designs a wedding dress for Raquela who is going to marry Jose Manuel. But this dress is not going to be used by Raquela. Jose Manuel finally realizes that whom he really loves is Angeles, Raquela's sister. Angeles loves him too, but she knows that's an impossible love. Then Angeles dies in an accident and at the same time Andrea has a heart attack. In the hospital, to save Andrea, they transplant her Angeles' heart.