For 4000 years after the origin of the earth was abandoned, humankind was at stake because of the appearance of the unknown entity Gnosis. Veterinary cruiser Vaux Linde, a member of the Federation of Star Clusters, boarded by engineer Shion Uzuki collects a mysterious object called Zohar. Unfortunately, it was nothing but an act of summoning Gnostic. While the fleet was devastatingly destroyed by the Gnosis attack, the android KOS-MOS for battle was launched without any command!