In the year AP 238, the space-exploration fleet Oracle continues its journey. Upon the discovery of a new planet, ARKS descends to investigate and exterminate any Falspawn. Today, a new recruit named Ash takes his first steps into the vast universe.

Though many perish, Ash and Afin return safely from their training. However, their first mission as new ARKS is to return to Naverius with their commander Kohana and the mysterious girl Matoi, and exterminate the rampant Falspawn.

During a mission on planet Naverius, Ash learns about the battle between ARKS and Dark Falz after encountering a girl on the "Council of Six" -- The six most powerful ARKS in the entire organization.

Back on an ARKS Ship, Ash and company are taking a breather when they meet Ulku, a girl who yearns to join ARKS. She talks about her childhood friend who joined ARKS without her and how he might be in the same class as them.

ARKS Ship 128, the "Themis", is attacked by Falspawn--the first such incident in 10 years. The ARKS soldiers can’t hide their panic as they sortie. Meanwhile, as Zig labors to repair the weapon...

Ash reunites with Zeno and Echo on his way to the medical center to visit Matoi. He finds her well, but his relief is cut short when Gettemhult shows up out of nowhere.