The real world we live in is just one of countless "planes". There is a mysterious organization called "Abnormal Order System", which recruits people called "Plane Riders" in the real world through a special APP. Their mission is to travel to various fantasy, science fiction, weird or dead dimensions to deliver takeaways to "customers" there. These customers may be elves, dwarves, nobles, gods, demons, ghosts, or even the last remnants of a certain civilization.
