It's been over a decade since the sudden appearance of the "gates"—the paths that connect our world with a different dimension. Since then, certain humans have awakened to supernatural powers. We call these individuals "hunters." Hunters make their living by using their powers to conquer dungeons inside the gates. In this world of tough customers, the low-ranked hunter Jinwoo Sung is known as "the weakest hunter of all mankind." One day, Jinwoo gets fatally injured when he runs into high-rank double dungeons hidden within a low-rank dungeon. Just then, a mysterious quest window appears in front of him.

On the verge of death, Jinwoo decides to accept the quest and starts leveling up... while the others aren't.

[Source: Crunchyroll]

Over a decade has passed since a pathway called a "gate," which connects this world and another dimension, suddenly appeared, and people with superhuman powers called "hunters" have been awakened. Hunters use their superhuman powers to conquer dungeons inside the gates to make a living, and Sung Jinwoo, a hunter of the lowest rank, is considered the Weakest Hunter of All Mankind. One day, he encounters a double dungeon, a high-level dungeon hidden inside a low-level one. In front of a severely wounded Jinwoo, a mysterious quest window pops up. On the verge of death, Jinwoo decides to take on the quest, which makes him the only person who can level up.

[Source: Crunchyroll]

It's been over ten years since gates that lead to another dimension have begun appearing across the world. The battles between the magic beasts inhabiting the dungeons through the gates and the human hunters who have awakened the abilities to fight them show no signs of ending. Ordinarily, a hunter's abilities do not change upon awakening, with their rank never increasing. However, the low-ranked Sung Jinwoo, known as "The Weakest Hunter of All Mankind," gained the ability to level up through battle during a raid on a double dungeon.

Having completed a job-change quest that earned him the job "Shadow Monarch" and command over an army of shadows, Jinwoo heads into battle seeking the ingredients for the Elixir of Life to save his sick mother.

[Source: Crunchyroll]