In order to uncover the secrets of Japanese yokai, a family of yokai from the American Yokai Empire arrives at a spiritual site in Japan, where Japanese yokai live just like ordinary humans. Since Japanese yokai have never seen American yokai before, the family quickly becomes popular among everyone. However, for the sake of their mission, the head of the family remains resolutely focused on the task at hand. Unexpectedly, obstacles and unforeseen incidents begin to arise.