In the late 26th century, overpopulation on Earth is reaching the breaking point, and humanity must find new frontiers. The terraforming of Mars has taken centuries but is now complete. The colonization of Mars by humanity is an epoch-making event, but an unintended side effect of the terraforming process unleashes a horror no one could ever have imagined...

The Annex 1 survivors find themselves fighting on all fronts against the Chinese forces sent from earth to wipe them out. As if that weren't enough, the Terraformars themselves aren't letting up on their attacks either. A plan is formulated to rescue the Annex 1 crew but to carry it out, they'll have to cross through hostile territory while under assault all the way!