Savage beasts run rampant through the stars, and the Divine Realm stands at the pinnacle of power. Humanity's strongest fighters are naturally a realm weaker, struggling to survive. The key to breaking this imbalance lies hidden in the blood essence and core of the Divine Realm's savage beasts. It is a source of hope, and also of destruction.
On the frontier planet of Moshu, the boy Mo Yuan watches his grandfather sacrifice himself to protect their home, piloting a battered mech to perish alongside the Star-Rank disaster beast "Sandworm." In the depths of despair over his loved one's death, Mo Yuan awakens his yuan force and enters the Gushing Spring Realm. He also senses a faint resonance deep within the family's nearly scrapped general-class mech, "Feigong."
Lin Han, a ruthless instructor at Xinghai Academy, sees the will Mo Yuan summoned in his desperate moment and offers him his only way forward: take the "Feigong," dismissed as an "antique," leave his nearly abandoned homeworld, and enter Xinghai Academy, where elites gather but class divisions are rigid. Bearing the weight of ridicule and doubt, Mo Yuan takes an oath to protect as his guiding fire and struggles onward through grueling training and life-or-death trials. He repairs "Feigong" and comes to understand its true meaning. Starting with clumsy operation of a standard-issue mech, he breaks through the Hegu, Zhongwan, Fengchi, Mingmen, Qihai, and Guanyuan realms one by one, tempering the Mohist ideal of protection into the "Defender of the Way," a shield on the battlefield.
When the Chi-Rank savage beast "Abyss Eater" tears through the defensive line and brings an apocalypse, his close friend Qin Feng sacrifices himself to save Mo Yuan, raising the soul-stirring question: "Why should mechs be a privilege of the great families?" On the brink of death, the core of "Feigong" awakens, and an ancient divine blood star map appears! Divine blood floods his body, and "Feigong" is reforged amid the sparks of the stars into a God-Sealing mech: "Defender of the Way"! Mo Yuan becomes a living boundary marker, declaring, "I myself shall be the boundary marker of humanity!" He faces the "Abyss Eater" head-on and kindles the spark of civilization.
