10 years ago, the Gate connecting the real world to the monster world was opened. Afterwords, some people received the power to hunt monsters within this Gate. However, not all of these ‘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 dungeons, with no skills whatsoever to display. I barely earned the required money by fighting in low level dungeons. But then I found a dungeon with the hardest difficulty, hidden within the D-rank dungeons! 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!