From the back of the adventure: "The Black Guardians: The heroes must wrest an ancient alien relic from the grasp of a dangerous crime lord, but this is only the beginning of their problems as the artifact is either the means to save a world or condemn it forever! Plus there are several others who wish to get their claws on it, as well! Freedom fighters, an old enemy and new allies await the adventurers in the dry deserts of Gator."