A decade ago, "the Gate" emerged, linking the real world with a realm of magic and monsters. To fight these vile beasts, ordinary people gained superhuman abilities and became known as "Hunters." Twenty-year-old Sung Jin-Woo is one such Hunter, yet he is labeled the "World's Weakest" due to his pitiful power, which falls short of even a lowly E-Rank. Nevertheless, he tirelessly hunts monsters in low-rank Gates to cover his mother's medical expenses. However, this wretched existence shifts when Jin-Woo—convinced he is the sole survivor of a mission that went terribly wrong—wakes up in a hospital three days later to discover a mysterious screen hovering before him. This "Quest Log" requires Jin-Woo to finish an unrealistic and grueling training regimen, or else face a fitting penalty. At first hesitant to obey due to the quest's severity, Jin-Woo soon realizes it might transform him into one of the world's most terrifying Hunters.