Captain John Farragut and the crew of the U.S.S. Merrimack face their greatest challenge as Caesar Romulus declares war on the United States of America with a direct attack on Earth. The Merrimack retaliates with an assault on the Roman capital world of Palatine, and in the midst of the chaos, the Hive descends on Earth. With the battle raging, Farragut finds himself in the middle of a final deadly showdown.