Yoon Seora is a low-ranking civil servant who awakens as an S-class hunter after cursing the system that manages the world. She decides to quit her job and live a life of adventure, but gets involved in dangerous situations with other awakened ones who have returned from the past or other worlds.

This is a romantic fantasy story that mixes action, humor and mystery, and shows how Yoon Seora deals with her new powers, her allies and enemies, and her contract with the mysterious administrator of Earth.