It is the 22nd Century and mankind has achieved wormhole space travel; colonizing several nearby planets in the Milky Way galaxy. The United Star Systems now struggles to provide a unified system of government for Earth and its colonies amidst civil war, rampant piracy, and slaver raids. Meanwhile, Kaleb Taylor, an ordinary kid from a farming colony, is placed directly into the mayhem of the interstellar conflict against his will. With his home destroyed and no other options but to enlist in the United Star Systems military, he volunteers to undergo the most intense training available in order to become a Recon Marine. Soon thereafter, Kaleb and his elite platoon find themselves on the high-tech front lines of battle with a new, powerful, intergalactic enemy that threatens to destroy all of humanity. Earth and the colonial governments must now decide whether to set aside old grudges and unite under the United Star Systems banner to defend against this mysterious enemy, or face certain annihilation.