"Die letzte Rache" narrates the eventful tale of the Worldly, an adventurer who enters the service of an ageing ruler in order to seek for him a successor. Unable to find a worthy heir, the Worldly succumbs to the temptation to seize power himself. The ruler, however, thwarts his plan and uses the Worldly, by means of a scientific experiment, to attain immortality. The Worldly wreaks vengeance by laying the ruler's kingdom to waste thereby preparing the ground for unforeseen intrigue: the ruler's son and daughter, united in incestuous love, take revenge for the inheritance denied them by subjecting their now immortal father to everlasting pain and suffering.