Maximus begins his survival in the First Plane by rescuing three novice trial participants—Tom, Sarah, and Pete—from a pack of Veridian wolves, using a crude wooden staff and his starting skills. He quickly realizes that the rules of this system-governed world are entirely different from his past life, forcing him to rely on life-attuned spirit energy instead of his locked mana. When the novices are later ambushed by a four-meter-long Sandwalker Lizard that spits stone-melting acid, Maximus takes command of the panicked group, ordering Sarah to detonate the beast's highly flammable venom pouches with a fireball. The resulting explosion slays the monster, propelling Maximus to level five and unlocking crucial class choices like Barkskin and his plant companion, Sprout. After retreating to the Resting Bench village, Maximus decides to bypass the system's rigid templates by applying his ancient archmage principles to his new energy source. He sits in meditation and manually condenses gaseous spirit energy within his abdomen, compressing the expanding pressure until it implodes and forms a solid, crystallized seed. This deliberate manipulation of the world's rules triggers a system anomaly, doubling his total spirit reserves and upgrading his basic class trait to Nature's Seed. His newfound power is immediately tested when a massive monster horde of kobolds and a giant Pyromancer lizardman attack the village. Maximus fights alongside the village elder, Edgar Kross, using his customized Static Surge and a newly acquired iron sword to cut down the beast riders. He slays the Pyromancer, claims a rare fire-attuned skill stone, and reaches level ten, unlocking the agile Cat Form. This rapid ascension draws the attention of both allies and hidden enemies, forcing him to leave the relative safety of the village to hunt in the deeper, more dangerous regions of the plane.

Setting out toward the Wildlands with his new companions, the spearman Oscar and the frost-wielding Felix, Maximus encounters a scouting party of zombified goblins that leads them to the ruined village of Replenishing Spring. Using his stealthy Cat Form, Maximus scouts the settlement and discovers three rogue necromancers who are murdering other participants to harvest their skill stones for a dark organization known as the Skill Hunters. The necromancers fuse the rotting remains of their victims into a towering, three-meter-tall Corpse Golem that charges the party. Maximus climbs onto the abomination's back, driving his blade into its spine and unleashing repeated bursts of Static Surge, while Felix freezes its limbs, enabling them to shatter the construct. Maximus ruthlessly executes the pleading necromancers to eliminate any future threat, a pragmatic choice that yields a cache of stolen skill stones and cements his role as the group's tactical leader. To prepare for the upcoming trials, Maximus travels to the Maneating Swamp to hunt the legendary Alabaster Crocodile, a level-twenty-one mutated beast named Silex. After baiting the massive predator into a pre-arranged field of exploding Scorching Lilies and ice traps, Maximus binds its jaws with Static Vines, sending currents of electricity through its body. Rather than slaying the majestic creature, he uses his newly evolved One of Us skill, pouring his immense willpower and spirit energy into the beast's mind until it acknowledges him as its leader. Taming Silex grants Maximus a powerful, water-manipulating ally and unlocks the ability to partially shapeshift his own body into a crocodile form. This hard-won victory significantly boosts his combat flexibility, but their loud battle in the swamp attracts the attention of a far more terrifying predator lurking in the nearby woods.

The party's journey grows increasingly perilous as they encounter a mutated, five-meter-tall Emerald Troll roasting human and goblin carcasses outside a massive cavern. Maximus orchestrates a high-stakes ambush, launching a lightning-infused Storm Javelin that tears away the monster's arm, only for the beast to instantly regenerate its lost limb and retaliate with tree-sized stakes. The troll's rapid healing makes it nearly immune to standard physical attacks, forcing the party into a desperate struggle where Felix and Oscar are severely battered and left with broken bones. In a desperate bid to end the fight, Maximus overloads his spirit seed, drawing in a massive surge of natural energy that threatens to rupture his organs, and hurls two colossal Storm Javelins that obliterate the troll's head. The massive influx of experience elevates him to level twenty-one, while Sprout absorbs the ambient energy to evolve into a Guardian Plant Spirit. While resting inside the cavern to heal their shattered bones, the group is ambushed by five ruthless female mages who have been burning down goblin settlements to level up and now demand the party's stored loot. When the mages refuse to retreat and trap them in a burning prison, Maximus shatters the construct, uses his Spore Cloud to paralyze them, and slaughters them without hesitation. This cold-blooded execution of human opponents shocks the idealistic Oscar and Felix, causing a moral rift within the group. Despite the tension, Maximus remains unapologetic, warning his companions that hesitation in the face of mortal enmity will only lead to their demise as they finally arrive at the Bastion of Hope, the last fortified settlement before the Wildlands.

At the Bastion of Hope, Maximus prepares for the final stretch of the first trial by brewing potent poison bombs and reinforcing the village's defenses against the legendary Blood King, a mutated level-thirty wolf named Vesper. When Vesper's pack launches a nocturnal assault, reviving fallen wolves through blood-linked chains, Maximus coordinates the defense, using his electrified water traps and poison bombs to decimate the vanguard. He chases the retreating King into the forest alongside Felix, Oscar, and the lunar warrior Maria, but they are ambushed by his treacherous cousin Toby and the shadow-wielding Andre. A chaotic battle erupts where Maximus slays Toby's associates, Brock and Amy, while Maria and Felix are severely wounded. Maximus uses his evolved taming skills to subdue Vesper, saving the wolf from his madness, just as Oscar and Felix are transported to the Second Plane. Refusing to hand the tamed wolf over to the greedy village leader, Maximus retreats into the Wildlands with his beasts, where he merges Lunar Flare and Solar Pyre to create the devastating B-rank Starlight Shower. Guided by the system, he joins forces with Lennox's elite group to hunt the Silent Queen ant, the regional ruler devouring the plane. Maximus creates the triple-helix Verdant Starstream to shatter the queen's impenetrable barrier, allowing the group to slay the monster. However, the queen's massive body begins to detonate with unstable mana and spirit energy. To save his companions, Maximus acts as a conduit, siphoning the catastrophic overflow into his own body. The immense energy forces his spirit core to sprout roots, but the sheer strain exhausts his human lifespan, leaving him with only three days to live unless he can reforge his body using the newly acquired Heavenly Body Method.