Three Marines who were deemed non-vital by the Company and left to rot on Xenomorph-infested Earth attempt to find proof that the Company was responsible for bringing the Xenomorphs to Earth in the first place. Instead, they find a nuclear reactor set to self-destruct that in 53 minutes will vaporize everything within one hundred square miles. The countdown has begun, and all that stands between these three Marines and their ship are countless Xenomorphs, scumbag Marines turned mercenaries, and worse.