Her father dies... her fiance dumps her... and she can't find a job... so she covers the waterfront. And then one night...

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