On an Earth where the Roman Empire never fell (but instead existed in secret societies for millennia, finally reestablishing itself on the planet Palatine) and is now embroiled in a war against the League of Earth Nations, a much more deadly foe emerges from the darkness of deep space -- the Hive. The governments of Palatine and Earth enter into an uneasy alliance to fight the alien invaders, nondescript antqagonists that exist only to consume. While the unified forces try to keep the Hive from destroying human-populated planets, one U.S. battleship, the Merrimack, sets off on a quest to find the Hive's homeworld and take the battle to its source. During the ship's desperate search, the crew of the Merrimack discovers a strange star cluster with three worlds inhabited by sentient beings. After first contact with the amazingly humanoid populace, Captain John Farragut discovers a series of wormholes that could unlock the secrets that could defeat the Hive -- or destroy humankind forever.