Captain Gravity encounters the Guardians of Thule in Libya and discovers that he is not the sole agent of gravity. Not only do the Guardians bend the force to their will, they also possess a far advanced knowledge of the power. Joshua must survive his attack in order to go to the source of Nazi control, Hitler’s Berlin. But unknown to the Captain, a mysterious presence lurks beneath Hitler’s headquarter, a presence that holds the keys to the world’s destruction.