Stony Brooke, Rusty Joslin and Rico, the Three Mesquiteers, are returning from Mexico and are stopped at the border by Army officials, who are attempting to apprehend smugglers who are buying cheap silver in Mexico and smuggling it into the States, where they can take advantage of a silver stabilizing measure and sell it at a high price.
Robert Livingston
as Stony Brooke
Raymond Hatton
as Rusty Joslin
Duncan Renaldo
as Rico Rinaldo
Kay Griffith
as Maria
George Douglas
as Ransome
Ruth Robinson
as Mama Rinaldo
Paul Marion
as Carlos Rinaldo
John Merton
as Henchman