A young man in high school attends his sister's sorority Halloween party. While he was in the basement, the college kids above him were playing at summoning a demon, and he was right below the summoning circle. Trapped, he was contracted to become an agent of a demon queen on Earth.

This a slow-burn slice-of-life story. The story follows a new young man as he slowly explores his new powers and how to increase them. The world is supernatural in nature, and those elements serve as his main protagonists as he grows.