Over four years ago the first phase of the Rikti War ended when Hero 1 led Omega Team into the Rikti main portal base and destroyed it. The Rikti withdrew into their hidden lairs and the war became focused on skirmishes. Recently, Positron has detected increased Rikti activity and must uncover their secrets. While Positron feverishly tries to determine what the warlike aliens are planning, the rest of the Freedom Phalanx seek out the one man with any knowledge of what happened during that cataclysmic explosion so many years ago, the Invulnerable Ajax.