The alien invasion began without warning.  It was brutally effective.  But mankind was determined to fight back.  It was for that reason alone that they managed to hold out until help arrived.
 
As Ultima lay dying on the battlefield, she saw the arrival of the three celetial entities that had come to save mankind from annhilation.   When they saved her, she knew she had found allies.
 
Forward Scout Xi, Assassin Tau, and Scout Quan were assigned to track down and destroy or capture the traitor Eml. To do so, they had to take control of the Machines, the Cyborg army that Eml had designed and built to conquer Earth. Forming an uneasy alliance with the human woman they rescued, Ultima, the four set out to destroy the traitor and his army to prevent mankind from extinction.