Slade, a gunfighter, robs a Texas train of a large shipment of gold and deposits it in a bank in the town of Friendly. The vault's contents are being sought by two rival gangs. Mexican bandit Papa Pedro and his men make two fumbling attempts to rob the vault, first by rushing the bank only to be chased away by a blast of gunfire, and then by attempting to break down the door with a battering ram. The second gang is led by the Rev. Pious Blue, who has established himself as the town's preacher; his associates, who include the beautiful Lyda Kabanov, plan to tunnel into the bank and dynamite the wall on the Fourth of July, when an explosion will go unnoticed. Texas Ranger Ben Quick, with his band of five Chinese secret service agents, is also trying to tunnel into the bank, but his mission is to obtain evidence that will incriminate Kincaid, the town's crooked mayor and owner of the bank. On the Fourth of July, Reverend Blue's gang reaches the vault first. While robbing the vault they accidentally discover the evidence against Kincaid; the gang is then chased by Quick until they come to a giant balloon waiting to take them to safety. The reverend miscalculates the weight of the gold, however, and the balloon is unable to rise. To lighten the load, Lyda jumps out, permitting the reverend to escape, and she remains with her lover, Quick; and the Texas Ranger gets the evidence needed to convict Kincaid.