Sarah makes a life-saving discovery for the finances of New Babylon: the city's basements are full of oil. With John, she pushes the door of the bank of Elmdale to finance a drill. They incur the wrath of Elizabeth Thurmann, the local potentate, who is preparing an ambush.

The crater of New Babylon has kept its promises: oil is flowing. Django and Seymour are commissioned to sell the precious black gold to Pueblo. But they are attacked by mercenaries who kidnap Seymour and immediately deliver him to Elizabeth. John and his two sons, supported by Django and Sarah, have no choice but to travel to Elmdale to save Seymour.