Novelist Yuan Yi made a living by writing supernatural stories. One day, on his way to the supermarket, he was severely injured while saving a little girl from the middle of the road. As he lost consciousness, he found himself inside the world of his own novel—Yin-Yang Curio Shop. From then on, Yuan Yi began running the shop, solving mysteries, and guiding lost souls. However, when he finally woke up, he realized it had all been nothing more than a fleeting dream.