The story follows Eli Stone, an ordinary man who, after dying in an accident, is reincarnated as a dungeon core in a magical fantasy world. As a dungeon core with the unique ability to create and control golems, Eli embarks on a journey to build and enhance his dungeon. The narrative unfolds slowly, with a focus on RPG-style game mechanics and dungeon development. Eli, guided by the mischievous fairy Lyra, designs intricate dungeon floors, sets traps, and creates various golems to challenge adventurers. As he refines his dungeon, he encounters a series of adventurers who test his creations. The story delves into Eli's growth as he learns the intricacies of dungeon management, explores the diverse world of Eldoria, and faces the consequences of his designs. Through encounters with different adventurer parties, Eli observes their strengths and flaws, leading him to continuously improve his dungeon. Themes of hubris, teamwork, and perseverance emerge as adventurers navigate Eli's dungeon, culminating in a dramatic boss battle that challenges their skills and unity. The tale highlights Eli's evolution from a novice dungeon core to a strategic mastermind, shaping his dungeon to become a formidable challenge for future adventurers.