Mechanical grad Yue Sheng’s startup collapses, leaving him 3 million in debt. Desperate, he lands a well-paid job at a remote toy store. He finds every figurine is a sealed primeval beast or innate immortal artifact. Using his engineering skills, he repairs rampaging ornaments and subdues powerful beasts and treasures. Cult sects misidentify him as a hermit Immortal Sovereign, creating hilarious gaps in understanding. As seals crumble, Yue Sheng learns of his ancestral vendetta, unlocks purifying powers to end Demon Realm turmoil and save countless souls. He rebuilds the toy shop into a Three Realms beast sanctuary.