More and more people are disappearing from society. Marked by tattoos from a mysterious stranger and granted strange powers, people are being spirited away to another world. As an escape from their mundane reality, they live out their lives as adventurers: exploring, gathering materials, hunting monsters, and sometimes each other. One boy, Evan, finds himself in a precarious situation. After watching his girlfriend murdered in front of him, he ventures into this other world in the hopes of finding a way to bring her back to life.