In a poor neighborhood in Mexico City, two gangs of kids fight for control of the center where they work as "boleros", musicians or announcers. "Completo" joins the gang led by "Rorro", a rival of the group headed by "Curricán".
Confederate Col. Lafe Harvey (Earl Ross) travels home after the Civil War, where he must tell his niece, Betty (Frances Grant), that her father is presumed dead. Soon after he returns, scavengers destroy the family home and he and Betty escape westward. Meanwhile, Gen. John Harvey (William Welch), Betty's father, has been seriously injured but is not dead. He arrives at the deserted plantation with the help of Union soldier Tom (Bob Steele), who then pledges to help John find his family
Rosario, una joven campesina, se entrega por amor a su novio sin sospechar que él la engaña con otra. La decepción y el dolor por la muerte de su padre hacen que la joven huya a Veracruz y se convierta en prostituta. Una noche, Rosario conoce a Alberto, un marino del cual queda prendada. Tras pasar una noche de amor juntos, el destino les depara una cruel sorpresa.
