April 2539. It has been more than a decade since the beginning of the Covenant War that has seen billions dead and colonies falling like dominoes. Humanity is spread thin and running out of time. The Office of Naval Intelligence and their Prowler Corps, a collective of secretive stealth ships, have found the ruthless Fleet of Particular Justice and their next likely target, a planet called Boundary--a rare stroke of luck for the battered United Nations Space Command.

With little time to prepare or plan, task force commander Captain Alastair Fulton and his small fleet have been dispatched to meet the Covenant head-on. With the help of the hastily formed Teal Team--Arthur-079, Solomon-069, Sheila-065, and Cal-141--Captain Fulton and his crew must meet their foe head-on to buy time the citizens of Boundary so desperately need to evacuate. An unlikely group of militia and political figures come together with the brave men and women of Task Force Lima to defy the Covenant in what they so desperately seek: the utter annihilation of humanity. Boundary's spirit is tough, but will it be enough?