Shane risks her life when she volunteers to fight an enemy spacecraft with another squadron, led by a former boyfriend whose new love was killed during a mission.

McQueen seeks reinstatement of his pilot status so he can fly what could be a suicide mission: find and destroy a seemingly invincible Chig super-bomber.

When Commodore Ross sees there's an opportunity to launch a potentially crippling offensive against the Chigs. Forced to abandon the 58th on a barren planet, Ross leaves the marines to fend for themselves with little ammo, no food-and no hope of rescue.