Easily surviving the collapsing bridge, Zorro (Reed Hadley), who is still attempting to prevent the shipment of ammunition to Juarez (Carleton Young) from being hijacked by Don del Oro and his hirelings, lights the flaming "Z" to alert his Fighting Legion. In the meantime, Don del Oro's chief lieutenant, Moreno (James Pierce), sets a deadly trap for the wagon train carrying the ammo, which he hides in a cage