When a lowly dungeon cleanup worker is caught in a catastrophic collapse deep beneath a conquered dungeon, everyone assumes he's dead. Trapped, injured, and falling into the forgotten depths, Kael discovers something impossible at the very bottom of the world—a place no hunter has ever returned from. With monsters, ancient secrets, and untold power hidden below, Kael must fight to survive in the deepest layer of the dungeon... where the true adventure begins.