Transmigrated into a world teeming with monsters, Lin Xuan, a low-level pioneer in the Sprout Organization, embarks on adventures in various secret realms. From the zero-tier Giant Rock Cave to the first-tier Magic Ant Nest and the second-tier Tree King Sea, his journey unfolds. With a system allowing him to create training clones, he discovers it's like an idle game from his past life. He effortlessly grows stronger, until the Sprout Organization notices his unusual progress. Lin Xuan then realizes that even seventh-tier warriors and the organization's leader are no match for him.