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".
Three bohemians rescue Ana María from her abusive stepfather. She lives chastely with them in gratitude. Over time, love blooms between her and Marcelo, despite their friends' heartache.
