10 years ago after “the Gate” that connected the real world with the monster world opened some of the ordinary everyday people received the power to hunt monsters within the Gate. They are known as “Hunters”. However not all Hunters are powerful. My name is Sung Jin-Woo an E-rank Hunter. I’m someone who has to risk his life in the lowliest of catacombs the “World’s Weakest”. Having no skills whatsoever to display I barely earned the required money by fighting in low-leveled catacombs… at least until I found a hidden catacomb with the hardest difficulty within the D-rank catacombs! In the end as I was accepting death I suddenly received a strange power a quest log that only I could see a secret to leveling up that only I know about! If I trained in accordance with my quests and hunted monsters my level would rise. Changing from the weakest Hunter to the strongest S-rank Hunter!