Five years after the Lingshan Incident, the world rests free from an alien invasion, but human threats start to resurface. The Commander of a private military company owning the name Respion, is reported M.I.A (missing in action) during a solo mission on a remote island located in the Mediterranean. Two members of the Respion Unit; Xtrypher and Shield, are assigned to a rescue mission at the request of their Squad Leader, Hyde, in an effort to rescue their commander. Armed with high-tech powered suits; Xtrypher and Shield are tasked to infiltrate the island and search for traces which could possibly lead to answers behind their commander's disappearance, only - things turn out being much more complicated than just an ordinary rescue mission, placing the entire human race at risk of yet another crisis...
—Clyde Vassallo