Bart Cutler is captured by the Rangers but let his girl friend Liza Curtis escape. After he is captured, Cutler informs them he is really Frank Parmalee, the dead Civil War hero brother of Captain Ed Parmalee. The men decide to take Frank into Mexico where the Mexicali police take him as he is wanted for murder in Mexico. At the same time Frank's widow Dr. Jessica Boyd is in Laredo. The Rangers tell Parmalee the Indians killed Cutler but he receives a telegram saying Cutler escaped from the Mexican prison. Frank and his gang rob a bank but Frank is severely wounded. Captain Montoya confronts Parmalee about working with Cutler revealing to Parmalee who Cutler really is. Frank's girl friend Liza brings his "widow" Jessica to tend to Frank's wound. All of the Rangers including Parmalee track them to Frank and the gang. Frank makes a deal with his brother to turn over his gun and not kill Jessica if the other Rangers leave and Parmalee gives him a head start leaving. However, Frank showed...