Rion Castro, a genius engineer, has been imprisoned in the underground factories of the desolate mining planet Kerberos-9 by the space pirate faction 'Scarlet Anchor.' Forced to retrofit an antiquated military vessel into a state-of-the-art weapon, Rion realizes his fate: he will be eliminated once his usefulness expires. After three years of captivity, Rion executes his escape plan. He hacks the facility's entire system, paralyzing the pirates' command structure, and flees—not alone, but along