During the summer holidays, Gash and his friends head to Mount Fuji for a picnic. There they meet a girl named Kotoha, who possesses a white magical book. The book reveals that Gash’s mother is hidden in a cave within the forest. When they locate the cave, they discover a blond‑haired youth named Wiseman already there. To rescue Wiseman, Gash and the others venture deeper into the cave, where they stumble upon an entrance to another world. Soon a powerful warrior, the Black Knight, appears and, believing Gash stole the 101st magical book, attacks them. Gash and Kiyomaro must find the r...