A decade ago, humanity found itself on the brink when the first gates—portals connecting to other dimensions filled with monsters immune to conventional weapons—appeared across the globe. Concurrently with the emergence of these gates, certain individuals were transformed into hunters, granted superhuman abilities. Tasked with entering the gates and clearing the dungeons inside, many hunters formed guilds to ensure their survival. Sung Jin-Woo is an E-rank hunter known as the weakest of all mankind. While exploring a dungeon considered safe, he and his party discover an unusual tunnel leading to a deeper section. Drawn by the promise of treasure, the group advances, only to face horrors beyond their imagination. Miraculously, Jin-Woo survives the ordeal and soon realizes he can access an interface visible only to him. This mysterious system offers the power he has long desired—but everything comes at a cost.