In the year 2063, the final frontier is a battle field. An earth united in peace takes its first steps toward interplanetary colonization, only to be threatened by an enigmatic alien race. Enter the 58th Squadron, a group of wet-behind-the-ears pilots with the Marine Corps Air and Space Cavalry. Under the rigorous tutelage of Sgt. Maj. Frank Bougus, reluctant leader Nathan West and fellow cadets Shane Vansen and Cooper Hawkes embark on a mission to save the galaxy.

After narrowly escaping the crippled alien battleship, the 58th finds itself imprisoned in the catacombs of a Chig penal colony. While Wang suffers in an alien torture chamber, Nathan encounters someone he'd only dreamed of seeing again.

While peace talks on the USS Saratoga go awry, the disgraced 58th are sent to retrieve POWs trapped in a crippled Space APC. Several enemy space fighters attack and the 58th take heavy losses. It is discovered the Chigs are only offering peace because they know Earth's military will defeat them.