After barely surviving their first encounter, the marines find themselves upon the battlefield once again, this time in the dark confines of an abandoned mining colony, hunted by hideous creatures that emerge from the tunnels.

Samuel's return home is brief, as he must accept a dangerous assignment so that he can pay off his mounting medical bills and get his family back on track. Samuel and Tango Platoon find themselves crossing into unknown parts of space and launching a massive land invasion of an uncharted planet.