The protagonist, Yang Jun, transmigrates into the lowest rung of an underground dungeon society as the bullied leader of a tribe of mushroom people. These dungeons are frequently visited by “players,” but these players are not humans; they are all sorts of non‑human creatures: snail clans, earthworms and other burrowing insects, bacteria tribes that directly compete with the mushroom folk for the same ecological niche, idealism‑preaching imperial birds, victory‑宣講‑obsessed dragon‑lizard squads, and even brutal, bloodthirsty demon‑folk.