After the death of her husband, Mrs. Lowe wants to tell the railroad where to find the half million U.S. dollars in gold her late husband, Matt, stole during a train robbery, and clear the family name for her son. Instead Lane convinces her to retrieve the gold so she can collect the $50,000 reward offered by the railroad for its return. Lane lines up some old friends to assist him in retrieving the gold for a share of the reward. But the other original train robbers have gathered a gang and will try to get the gold at any cost. As they all journey into Mexico in search of the hidden gold they are followed closely by a Pinkerton Government Services agent.