23-year-old Son Woo-jin, disillusioned with life and unemployed, suddenly becomes the sole owner of a mysterious convenience store in Hannam and finds himself in another world where customers are not only people, but also fantastic creatures from a magical world. Together with his new assistant Harin, an inhabitant of this world, he plunges into the realm of magic and mystical creatures, striving to unravel the secrets of his new life and find his true purpose.