Ten years have passed in a flash, and the war between the earthlings and the Zerg is in full swing and intensifying. One day, Air Marshal Omar Arnock (Stephen Hogan) came to inspect the remote farm of the earthlings, Mount Roku, and the then Colonel Johnny Rick (Casper Van Dien) also came with him. During this period, Arnock's mind was controlled by the Zerg King. He cut off the power supply of the quarantine zone, leaving the base completely unprotected. That night, the Zerg launched a general attack on the quarantine zone. Although the Earth Army resisted tenaciously, it was defeated due to its outnumbered strength and the base fell. Arnock fled with a group of confidants, and the spacecraft made an emergency landing on the planet OM-1. Rick was sentenced to death by hanging by a military court for dereliction of duty, and was rescued by the government's secret department at the time of execution. Arnock knew the secret of the location of the federal fleet base, and it would be unimaginable if the Zerg knew it. Therefore, the government's top leaders asked Rick to take a team of people to rescue the trapped Arnock...