Since ancient times, spiritual beings who existed to help humans suddenly received a warning from the gods: they must prove that their existence is still necessary. Unsure of how they can help humans in the modern world, the spiritual beings decide to send young spirits down to the human realm to find the answer. Meanwhile, Park Geuru, a college student who now has to endure a five-hour round-trip commute due to a sudden move, is living difficult days. One day, he happens to make a bet with Sihan, a dokkaebi (goblin)... and from that moment on, his life begins to change as he meets new people..