The story concerns two agents, one Mexican (PJF) and one American, who are tasked to stop the smuggling of Mexican migrant workers across the border to California. The two agents go undercover, one as a poor migrant.
Ricardo Montalban
as Pablo Rodriguez
George Murphy
as Jack Bearnes
Howard Da Silva
as Owen Parkson
James Mitchell
as Juan Garcia
Arnold Moss
as Zopilote
Alfonso Bedoya
as Cuchillo
Teresa Celli
as Maria
Charles McGraw
as Jeff Amboy
José Torvay
as Pocoloco
John Ridgely
as Mr. Neley
Arthur Hunnicutt
as Clayton Nordell
Sig Ruman
as Hugo Wolfgang Ulrich