In the interstellar era, the Outpost of the Bastion was raided by the Outer Alliance. Scrap salvager Cole piloted a retired prototype mech from the museum to drive off the enemy and earned the code name 'Zero.' To clear his father Elias's name, tarnished by accusations of treason fifteen years ago, he entered the grueling Bastion trials, facing all kinds of traps set by Senator Kessler. With his exceptional mech piloting skills, Cole went through tests like the centrifuge, vacuum depressurization, and blind navigation. He found the investigation notes his father left behind, uncovered the truth about political rivals colluding with the enemy, led an assault team deep into enemy space, and ultimately exposed the full conspiracy, restoring his father's honor.
