Damion Wells enters Nerotath with a dead man's memories and a newborn's fragile body, and the Magic System makes him dangerous before he can crawl. The interface boots with a status screen that lists his age as zero and hands him a single free skill draw. He blindly chooses Mana Absorption, which pulls in five mana per second, and with a mana capacity of only five his core overflows in two seconds. Excess mana floods his undeveloped pathways, the warning arrives too late, and his mana pathways are heavily damaged with only a five percent chance to heal when the system fully unlocks. The pain makes his parents think something is wrong with his brain, and his mother hovers over him in constant fear. Yet the system immediately gives him a quest to learn the Otash language, and Damion turns every feeding and lullaby into a lesson. By one month old he completes the quest, gains a hundred experience and one store credit, and can suddenly understand his parents perfectly. His intelligence rises, his dexterity rises as he learns to control his infant body, and his mana capacity grows to twenty five through the very accident that hurt him. He spends the first years of his childhood hiding his maturity, acting like a baby when his mother worries, and absorbing knowledge from every book in the house. At six he enters school early and quickly bores of lessons meant for children his physical age. He learns that Nerotath has recorded history stretching back over one hundred eighty thousand years and that knights fought for humanity long before mages appeared. The first milestone closes with Damion still trapped in a child's body, carrying a damaged magic core, a dangerous passive spell, and a system countdown that will take another twelve years to finish. His secret resolve is simple, to grow strong enough that when the system finally unlocks, the world will not know what hit it.

Damion's school years become a hunt for answers about his sealed magic. In class he sees the first spell, Minor Heal, and the Magic System quietly records the magic seal even though he cannot use it because his affinity is locked. He makes his way to the school library and finds Hermetics Study of Magic Seals, a massive book filled with tier one spells for every common affinity. He flips through it and records more than twenty magical seals, only to discover all of them are unusable. Panic hits when he reads that a person is limited to learning twenty magic seals in a lifetime, but the system explains that unusable recorded seals and passive spells do not count against his limit. He is left with one burning question, what affinity will be revealed when the lock finally breaks. The answer nearly comes during the beast wave panic in Saung when Dean Richard Thorn of Silver Spire Academy offers to test him with a crystal. The moment Damion touches it, the Magic System treats the intrusion as a hostile act and shatters the crystal to dust. Dean Thorn blames Damion, rages that he will never be trained as a mage, and storms out of the police station. This becomes the first great face-slapping reversal, because the boy publicly rejected as worthless is actually carrying a forbidden system that refuses to let any outside force expose its secrets. The retired librarian Helga Teft reveals herself as an A Rank water mage and senses the remarkable power in Damion's core. She begins training him privately as a knight, giving him mana control exercises, physical conditioning, and a D Rank sword with a fire attack glyph. Her plan is to build his body and combat instinct so that when the seal lifts, he will be a hybrid terror, a mage who can fight in close quarters, read the battlefield, and strike without warning. Damion's peers mock him for having no affinity, but he answers them by shaping raw mana into a glowing ball in his hand. The milestone ends with a boy who has been publicly blacklisted from magic academies, privately trained by an A Rank master, and closer than anyone knows to becoming something unprecedented.

The moment Damion turns fifteen, he earns his knight adventurer license and steps into a world far harsher than any game. His first trade caravan escort is attacked by bandits, and he watches men die before he kills his first foe. The horror of real blood and real consequence forces him to accept that Nerotath demands strength or death. He befriends Ethan Hoyt, a daggers knight with a trader father, and Arica Miller, a young spatial mage who becomes his link to dungeon runs and rare discoveries. In a C Rank graveyard dungeon he is hurled across a room by a skeleton champion, but the party still clears the dungeon and earns a fortune. He later takes a mission to hunt Aerico in Benault Forest and discovers the creatures are not Ferocious Beasts at all but Demonic Beasts with tiny cores in their skulls. He finds a cave filled with them, reports it to the Adventurer Association, and sets off a chain of events that reveals an entire D Rank dungeon hidden underground. In that dungeon his team finds Magic Absorbing Crystals, strips a goblin village down to its foundations, and plunders a Heavenly Wind Enhancing Fruit worth thousands of gold. Every success paints a larger target on his back. The Falks Guild, already punished for banditry, puts a bounty on his head, and four assassins ambush him by his ground car. Damion kills them all, learns of the bounty, and keeps moving forward. He advances to D Rank magic power, buys better gear, and begins building a reputation as a young knight who does the impossible. The same people who once mocked him now hear his name whispered in every guild hall and adventurer lounge. His system quests overflow with experience and store credits, but leveling still cannot begin until the system unlocks. The milestone ends with Damion rich, hunted, and standing on the edge of a transformation that will change the world.

With only days left on the Magic System timer, Damion enters a C Rank desert dungeon as a bodyguard and watches two arrogant Fire mages learn humility the hard way. The real test arrives when Saung's alarms scream a beast wave warning. Thousands of Demonic Beasts pour from the Benault Forest, led by three S Rank Arcdotus, monstrous bears with ice and sound magic that flatten the city walls. Damion is knocked from the wall when the first Arcdotus slams through a frozen section of the gates, and he lands in the rubble gap with no choice but to hold the line. For the rest of the day and through the night he fights Wind Wolves, Stone Bears, goblins, and everything else that tries to enter the city. He uses Mana Absorption to keep his mana topped up and his body moving long past the point of exhaustion. He proves himself worthy of legend, cutting down a C Rank goblin champion, burning waves of Demonic Beasts, and finally leaping onto the back of a Deinosuchus when he is separated from his sword. The beast nearly kills him, but his passive mana drain weakens the monster enough for him to destroy its eye and survive. Assist forces rebuild the wall, and Damion collapses into a cot in a field hospital. When he wakes, the S Rank threat is gone and the countdown is almost over. He returns to the hunt for fleeing Demonic Beasts, and in the middle of a battle against a rogue crocodile-like beast, the Magic System chimes with the message he has waited eighteen years to hear. The system is fully unlocked. Damion has achieved mage status. The story cuts at the moment he finally stands on the threshold of his true power.