During a routine resource haul mission in Sector One, Cole Astra pilots his mech alongside his elite family. The situation escalates when a massive, unexpected 'Gold-class' monster emerges from the Rift. With their mechs overwhelmed, the other pilots abandon the field, leaving Cole and his crew stranded and facing certain death as the powerful hostile closes in.
A pilot's mech is destroyed in battle, leaving him critically wounded and facing imminent death. In desperation, he initiates activation of a mysterious alien core fragment, an artifact his mother retrieved from the Abyss. Unlike others who pilot mechs, his body directly absorbs the core's immense energy, granting him a massive power boost. Now, as his turn begins, he prepares to fight bare-handed, empowered to the level of Gold Tier Three.
Cole unexpectedly returns home after his mech was destroyed, much to the surprise of his father Charles and brother William. Charles confronts Cole, furious that he disobeyed orders, destroyed an expensive Scout mech, and has ruined five family machines. Cole defends himself, claiming he saved lives and paid for the mechs himself with salvage. Tension escalates when William accuses their mother Catherine of secretly funding Cole's failed ventures. As Catherine pleads for Cole, calling him Charles's son, William dismisses him as a 'forty-percent washout'. The confrontation culminates with Cole issuing a protective threat, promising violence if William touches their mother.
A man named Cole is given an ultimatum by a family member: surrender or be exiled. He chooses to leave, renouncing his heartless family. As he departs with his mother, he is taunted and told he is nobody without the Astra name. Cole vows to compete in the upcoming Rift Trials and crush the family's pride to prove them wrong. His mother secretly gives him her old, powerful mech, the Ephemera, for protection. She stays behind, claiming her status will keep her safe, as Cole promises to return for her.
Cole pushes his mech to the limit evacuating civilians from a crisis, earning a rebuke from a commander who points out his machine is now wrecked again. Amidst the chaos, Cole is reminded he is engaged to a woman named Grace, while another person present defends his character despite his failures. With his mech broken, the group dismisses further discussion to focus on the immediate, urgent mission to protect the city.
A man named Grace is awakened by an associate amid a combat scenario where power is revered. The associate, prioritizing survival, callously leaves Grace behind to face a 'Platinum-class' threat alone. An angry Grace calls the man a coward and a son of a bitch as he departs. In this betrayal, Grace is abandoned with a powerful enemy, and the associate declares that his own family name has now been cleansed by leaving Grace to his fate.
In a tense battle, a man's mech is critically damaged by his opponent Charles. Instead of despairing, he celebrates the arrival of a 'real fight.' As the enemy destroys his mech, the man remains defiant, revealing the attack has disabled a limiter on his own body. He discovers he now channels a 'Platinum core's' full power without the mech's armor, feeling incredible strength. His horrified opponent questions what he is, to which the man coolly states his core's black-market value. The episode ends with the unarmored man standing empowered, facing an enemy who just unleashed a far greater threat.
At the scene of a destroyed powerful entity called the Fallen Nun, Grace denies responsibility. She discovers shattered armor from a high-grade mech, the Ephemera, belonging to a pilot named Cole, who was presumed dead by his faction, the Astras. Another person arrives to claim the valuable Fallen Nun core and offers Grace an advanced mech, the Thunderlord, as payment, settling their deal. Grace accepts, privately noting that the Astras, who cast Cole out, are unaware he might still be a threat.
The Abyss Arena trials begin, with Charles Astra pressured by his father to win glory for their dynasty. Charles’s brother Cole died fighting monsters, but Charles coldly claims Cole’s death was a useful sacrifice. Their aunt Catherine accuses Charles of murder, while the father declares he disowned Cole, showing no grief. Catherine denounces the family as heartless. Overcome, Charles privately apologizes to his mother for the pain, revealing a conflicted guilt beneath his ruthless ambition.
Three decades after the Abyss Rifts unleashed mechanical horrors, humanity relies on mechs for survival. Cole Astra, scorned by his family for his low neural-sync rate, faces their contempt until a dormant inheritance from his mother awakens at death's door. He gains the forbidden power to absorb mech energy directly into his body. Dominating the Resource Trials, he severs ties with his ruthless family in triumph. When three demigod abominations besiege the city, Cole's own mech is shattered, trapping him. Pushing beyond his limits, he masters the Storm Sovereign's might, unleashing a sky-rending tornado to slay the demigod and avert the catastrophe. After a final farewell to his mother, he becomes a shooting star, streaking toward distant battlefields as his true odyssey begins.