The first two confrontations with Dr. Pon Eho left Edo significantly damaged, and the city has finally begun settling into something like normalcy. Rami Nanahikari, her companion Pochi, and her grandparents follow a new lead to the beach in search of more sacred treasures. Rami and Pochi wander to an abandoned shrine, find a sealed door they cannot open, and discover nearby a ring bearing the same seal as the door. The ring proves to be one of King Solomon's Treasures — the first clue in a trail that leads across all of Japan. Dr. Pon tracks every step of Rami's search.