To secure quick cash for her overdue rent and avoid imminent eviction by her demanding landlord, Angelica registers for a city-sponsored weekend cleanup program at a local lakeside. Desperate to motivate her sluggish, unemployed self, she jokingly orders herself to pick up exactly one thousand pieces of trash without stopping, unknowingly initiating an absolute contract under her own summoner authority. Instantly, her body is hijacked by her own command, forcing her to work relentlessly through physical exhaustion, tattered hands, and freezing winter temperatures. She watches in horror as her limbs move entirely on their own, ignoring her silent pleas to rest or even to put her kicked-off shoe back on. Along the way, the system rewards her relentless labor by unlocking vital passive skills like Cold Resistance and Hunger Resistance, alongside crucial stat boosts to her vigor. She even manages to douse herself in freezing water just to get a drink, surviving only because her newly unlocked resistances adapt to the harsh conditions. As she struggles against her own physical limits in the dark, she finally stabs the last bottle cap to complete the grueling task, earning her first major payout and unlocking the achievement of being enslaved. This ordeal confirms the terrifying reality of her new existence, proving that she can force her own body to perform superhuman feats but at a steep physical and mental cost. When she finally returns to her apartment to rest, she realizes that she must learn to navigate her absolute commands carefully, lest she trap herself in another endless, agonizing loop of her own making. But as she drifts off to sleep, she hears mysterious voices whispering in her mind, calling her to cross the threshold into a dangerous world of magic, leaving her to wonder if she can ever truly escape the grasp of other summoners. Her exhaustion reaches its peak as the sun sets over the lake, leaving her entirely alone under the dim streetlights of Vulgrest. She is forced to adapt on the fly, learning to manipulate the wording of her own commands to allow for minor breaks, yet the core of the contract remains unyielding. This first taste of power is both a blessing and a curse, showing her that her survival depends entirely on her ability to outsmart her own system.

Angelica answers her first external summons from a naive young summoner named Garvin in the city of Strocaster, who mistakes her for a standard bound imp. Since her soulbound status makes her immune to his weak binding circle, she negotiates a lucrative contract to poison his former college bully, Mart Hucklebain, in exchange for eight hundred dollars. Returning to Vulgrest, she concocts a vile, food-poisoning mixture using raw chicken, milk, and moldy cheese, successfully swapping it with Mart's pre-mixed protein shake while utilizing her natural demonic invisibility. She also takes the opportunity to raid Mart's kitchen, devouring his cookies and realizing that her demonic nature finds a strange, malicious joy in committing petty acts of spite. This successful mission earns her a massive payout, but it also forces her to confront her changing identity as she voluntarily deactivates her human disguise in front of her bathroom mirror. For the first time, she beholds her true demonic form: a tiny, round, and incredibly fluffy blonde puffball imp with tan horns, small wings, and a tail. This physical revelation forces her to accept that she is no longer human, but a completely new species with its own set of instincts, stats, and a rapidly growing sense of malice. She is shocked to discover that her very blood has become toxic, unlocking the poison chef skill which threatens to contaminate her own food unless she spends her hard-earned growth points to purchase the poison eater passive. To fund this survival skill, she must plunge back into the dangerous world of summoning, accepting contracts from more experienced masters who might not be as easily fooled as Garvin. The realization that she is a monster living a double life in a mundane apartment building fills her with a deep, lingering dread, especially as she realizes her beloved cat can sense the strange, otherworldly presence she now exudes.

Seeking more essence to unlock the poison eater skill, Angelica accepts a summons from an apprentice summoner named Lustre, who turns out to be a spoiled rich girl. Bound by a strict order-exhaust contract, Angelica is forced to clean Lustre's lavish study and cook her a multi-course lunch before receiving a final, terrifying command: to steal the priceless Quilllaced Tiara from the heavily guarded Migrore Museum. Despite her protests, Lustre uses a forced command to compel her, forcing Angelica to infiltrate the museum while invisible, only to trigger a loud security alarm the moment she touches the artifact. A magically proficient security guard armed with a powerful runic rifle immediately spots her, opening fire and severely wounding her wing and horn. Trapped in a foreign country without her telepathic link or return spell, Angelica must use her creativity to survive, unlocking the frost touch skill to turn the smooth museum floors into a slippery, high-speed ice rink. She skates through a hail of bullets, dodging shrapnel and crashing through a stained-glass window in a desperate, cinematic escape that leaves her on the brink of death. Although she successfully returns to her apartment with the tiara, the harrowing experience leaves her traumatized, furious at the callousness of summoners, and deeply aware of her own vulnerability. She realizes that she is merely a pawn in a larger, hidden conflict between powerful factions, and that she must become strong enough to protect her own freedom. To make matters worse, she discovers that the tiara she risked her life for is missing its core rune, rendering it a beautiful but dangerous paperweight that she cannot easily sell without drawing the attention of the authorities or rival sects. This realization hardens her resolve, transforming her from a passive victim into a determined player who will stop at nothing to secure her own safety and independence.

Hoping to secure a safe source of essence without the threat of permanent binding, Angelica teams up with a group of local sect summoners for a coordinated malignant hunt. Guided by a borrowed malignant sense rune, she tracks the invisible, mana-eating parasites through the streets of Vulgrest, proving her combat competence by defeating several low-level beasts with her dagger. However, the hunt escalates dramatically at her former elementary school playground, which has become a massive feeding ground teeming with dozens of hidden malignants. As the summoners engage the horde, Angelica is ambushed inside a playground dome by a swarm of rocky, egg-shaped malignants that attempt to crush her. She quickly adapts, spending her newly earned essence to level up her demon rank and unlock toxic imbuement, allowing her to decay the stone-like monsters with a single touch. The climax of the battle occurs when a massive, level twenty-three malignant emerges from the ground, shattering the playground equipment and tossing Angelica aside with ease. Saved by her newly unlocked racial bonuses, she uses her creativity to combine her skills into a devastating airstrike combo, launching herself from the sky and piercing the giant monster with a massive, poisoned ice lance. Her victory earns her a massive payout of essence and cash, alongside the respect of the sect summoners who offer her a permanent partnership. Although she declines to protect her secret identity, the battle solidifies her confidence, proving that she has the potential to become a powerful force in her own right. She realizes that she no longer has to hide in the shadows, as her unique blend of human creativity and demonic magic allows her to carve out her own path. With her bank account growing and her skills rapidly leveling up, she finally sees a future where she can live peacefully on her own terms, free from the control of any master.