is on its final voyage before being Ship decommissioning and turning into a floating museum. When is attacked and destroyed by a mysterious force, World War III looms. The captain of ''Iowa'' chases an invisible ship, which they discover to be an alien force waging war on Earth. Only the crew of this last American battleship, stands in their way.<ref name="thegeektwins.com"></ref> (The Iowa's outdated technology is immune to the electromagnetic pulse (EMP) weapons of the alien.)