Isabel is abandoned at the door of an orphanage a few days after birth. There she grows between the jokes of the other girls and the mistreatment of the harsh director called "Justa." One day her classmates show her a false birth certificate where it says that her father's name is Jesús García, that he is alive and resides in Mexico City, so she, with the hope of having a family, escapes from the orphanage towards Mexico City to look for her supposed father.