Desperate to save his family from the Firewalker invasion, Derek Williams plots a course to the frozen wastelands of the Northern frontier, in search of the last known human outpost. The Firewalkers, led by the command of Faceless, are in pursuit.
Unaware they might become the last of the human race, Captain Walker coordinates an expedition to the surface of Planet Cylacus, but upon breaking through its atmosphere the mission becomes perilous. Without radio communication, a group of survivors explore the verdant rainforest to locate the missing teams.