The baronial civilization that ruled postapocalyptic America stands on the threshold of a much more sinister plot: the complete domination of Earth. These oppressors are determined to relegate humanity to the status of slavery, and crush the nascent force of freedom fighters who've dared to rebel against a powerful alien race. Rumors of an ancient doomsday device come to the attention of the Cerberus rebels when it's stolen by an old enemy, Gilgamesh...